Notas de la versión de Unreal Engine 5.8

Novedades

El lanzamiento de Unreal Engine 5.8 sigue mejorando el conjunto de herramientas de UE5. Esta versión ofrece mejoras en una amplia variedad de áreas, como el renderizado, los personajes y la animación, la construcción de mundos, la generación procedimental de contenido y mucho más.

Esta versión incluye mejoras enviadas por nuestra comunidad de desarrolladores de Unreal Engine en GitHub. Queremos dar las gracias a todos los colaboradores de Unreal Engine 5.8:

ABostrom, adam-struge-cdpr, AHGS-Jens, AlexanderVeselov-arm, alexdjq, AlexKenkenbergMetrea, Almax27, AMcClean97, Armageddon-15, aziogroup, ben-mkiv, BibbitM, BlackMATov, BlueMountainsIO, bohdon, byjtew, byte-warlock, cneumann, ColinGulliver, daktor, Damon3000s, Darcy3000s, davidesocol, dman82499, dthex5d, dyanikoglu, dzianisbutsianouski-cdpr, Edstub207, Epiphane, erebel55, Erlandys, filipkoperski, funfoofi, gamethread, Gearbox-SFatnassi, h13jc, HSeo, hugebug4ever, Iannis623, iniside, intvoker, Itotallyhavememes, ivorne, jacksonhvisuals, Jal1338, jdamdami, jeremy-skymap, JiayinCaoNV, JonnyTsGitHub, jorgenpt, JRProdSD, KaizerDragomir, kiruru002, kjohnsonTNM, kroopson, kumikai-nick, l-t-m-f, lapislosh, lclara-BARB, leeejongmin, LightKL, luciddream-tsin, Maigo, MarkJGx, Marvelius, megesdal, melku, mfgoleleka, microneo, mikeseese, mrobitaille-riot, Murazaki, nils-soderman, nrs-cerickson, Ogniok, pafuhana1213, peterschusteratms, PICO-XR, pigi5, PR3C14D0, ProdigyThirteen, PushStartInteractive, rdunnington, RedFlowering, redxdev, Riopho, riotcam, RKIV, rmatteson-riot-personal, rokenrock, ronaldogsk, Sage-of-Mirrors, sareali, SimonLeeGit, skokon, Skylonxe, slonopotamus, SoulSharer, SRombauts, ssutherland-riot, TeamBaconn, TheJSLo, tomilov, Vaei, Variann, VesCodes, x380kkm, yaakuro, yangskyboxlabs, yicwang25, zompi2

Renderizado

Megalights

Megalights ya está listo para la producción con Unreal Engine 5.8. Hemos reducido considerablemente el ruido para maximizar la fidelidad visual, al mismo tiempo que hemos mejorado el rendimiento general para alcanzar los 60 fps. También hemos incluido nuevas herramientas para ayudar a depurar y optimizar tus escenas. 

Compatibilidad de funciones

• Compatibilidad con transmisión (dispersión subsuperficial)

• Compatibilidad con nueva traslucidez basada en fróxel

• Iluminación de traslucidez de alta calidad en la capa frontal

• Compatibilidad IES para volumetría y translucidez

• Compatibilidad con canales de iluminación

• Sombras de las nubes

• Compatibilidad con armas en primera persona

Vistas de visualización

• Herramienta Buscador de luz (depuración y optimización)

• Herramienta Visualizador de rayos (recuento de iteraciones de rayos)

• Vista del proyector de sombras y del desajuste del proyector de sombras

Para obtener más información sobre esta función, consulta MegaLights.

Lumen Lite (beta)

Lumen Lite es un nuevo ajuste de calidad media para la iluminación global que utiliza campos de irradiancia con oclusión de sonda compatibles con Lumen. Es el doble de rápido que Lumen de alta calidad, que apunta a 60 fps en PlayStation 5, mientras mantiene la dirección artística para juegos que dependen de la iluminación global. Esta es la nueva ruta por defecto para las consolas portátiles de última generación, donde se puede utilizar a 60 fps, y también es compatible con PC.

Para obtener más información sobre esta función, consulta Lumen Technical Details y Lumen Performance Guide.

Materiales AxF de X-Rite como Substrate

Estamos añadiendo compatibilidad para importar materiales medidos desde el formato AxF de X-Rite a Unreal Engine, utilizando el sistema de materiales Substrate.

Esta función permite a los equipos de visualización industrial y automovilística importar materiales escaneados del mundo real de forma muy realista, exportados desde X-Rite Pantora, directamente a Unreal Engine.

FSSS - Dispersión de niebla de espacio en pantalla (experimental)

Con Unreal Engine 5.8, introducimos una función experimental Dispersión de niebla de espacio en pantalla (FSSS) en el componente de niebla de altura exponencial que aproxima la dispersión múltiple de la luz dentro de medios participantes, haciendo que la niebla densa, el humo y el polvo parezcan más borrosos y más integrados en la escena simulando cómo la luz se dispersa a través de efectos volumétricos.

Es compatible con todos los volúmenes de niebla volumétrica y niebla local, con controles configurables para la integración del color de la escena y la propagación de la dispersión, aunque las nubes volumétricas y los volúmenes heterogéneos aún no son compatibles. Como función experimental, actualmente solo ofrece un único nivel de desenfoque de calidad y puede mostrar artefactos visuales.

Sombreado NPR de Substrate (experimental)

Con Unreal Engine 5.8, presentamos el sombreado animado de Substrate experimental, una solución de renderizado no fotorrealista (NPR) estilizada basada en el modo GBuffer interpolable de Substrate (heredado). Es compatible con todos los tipos de luz, incluidas las luces locales, las luces cenitales y la iluminación global de Lumen, y ofrece un control preciso sobre la respuesta difusa y especular a través de un nuevo BSDF de animación de Substrate y un recurso de perfil animado.

Las funciones de sombreado NPR de Substrate incluyen control especular y difuso basado en rampas con difuminado, extinción de autosombreado con patrones de eclosión, resaltados especulares anisotrópicos y controles de escala de iluminación global. 

Personajes y animación

Mejoras en el rig de control modular

En Unreal Engine 5.8, nos hemos centrado en mejorar la estabilidad y la usabilidad diaria del rig de control modular. Estas actualizaciones resuelven problemas que llevaban tiempo afectando a la gestión de jerarquías, la creación de módulos, los procesos de trabajo de los conectores y el comportamiento de la duplicación.

Visualización

• Nueva opción del visor Mostrar solo los acoples vacíos que simplifica arrastrar y soltar módulos y ayuda a habilitar la creación de acoples encima de los módulos.

Jerarquía y persistencia de estado

Hemos mejorado la fiabilidad y la coherencia de las jerarquías de los módulos y del rig:

• La jerarquía del rig y la jerarquía de los módulos ahora conservan de forma fiable su estado después de la compilación.

• Hemos corregido un error por el que interactuar con ajustes de clases en los módulos de rig podría hacer que la jerarquía del rig desapareciera.

• Hemos resuelto un problema de deshacer/rehacer que podía borrar toda la jerarquía del rig.

• Los ajustes del filtro de jerarquía modular ahora se mantienen entre sesiones.

• Hemos corregido un error por el que los controles seleccionados podían quedarse atascados después de compilar módulos dependientes.

• La visibilidad del visor esquemático ahora se mantiene entre sesiones del editor.

• Los campos de clase del rig del módulo ahora muestran tanto el nombre del recurso como la ruta completa del recurso.

• Ahora, al hacer clic con la tecla Mayús y con el botón central del ratón, se amplían o se contraen los hijos en la jerarquía de módulos.

• El árbol de jerarquía de módulos es ahora más compacto y legible.

• La búsqueda en la jerarquía de módulos ahora incluye la clase de módulo cuando esa columna está visible.

• Hemos añadido opciones para mostrar u ocultar las columnas Conector y Clase de módulo.

• Hemos añadido atajos de teclado para mostrar/ocultar los conectores opcionales, secundarios y sin resolver en la jerarquía de módulos.

Proceso de trabajo de creación y desarrollo de módulos

Hemos simplificado las tareas de creación comunes y se ha mejorado la detección:

• Los módulos ahora se pueden duplicar haciendo clic derecho en la jerarquía de módulos.

• Hemos añadido un atajo de teclado para duplicar módulos.

• Arrastrar y soltar módulos ahora habilita automáticamente la vista esquemática.

• Hemos añadido el módulo Rig de control al menú Crear recurso de rig de control.

• Hemos añadido un atajo de teclado para crear nuevos acoples.

Mejoras en el sistema de conectores

Mejoras significativas en la usabilidad y la gestión de reglas para los conectores:

• Los tipos de forma ahora se pueden seleccionar desde un menú desplegable en el editor de rig modular.

• Las descripciones de los conectores definidas en un módulo de rig de control ahora aparecen como burbujas informativas.

• Los controles de reordenación del conector de matriz ahora son visibles por defecto.

• Los conectores no arrastrables muestran un icono de conector y las conexiones mediante una burbuja informativa.

• Se ha habilitado la posibilidad de arrastrar y soltar conectores directamente desde el panel Detalles.

• Se ha añadido compatibilidad para mostrar/ocultar la clase de conector y módulo en la jerarquía.

• La opción Borrar todo ahora borra correctamente las entradas de matriz en el panel Detalles.

• Hemos corregido la imposibilidad de eliminar todas las conexiones de los conectores de matriz.

• Hemos corregido el error por el que los conectores que no son matrices aparecían incorrectamente como matrices en el panel Detalles.

• Hemos añadido compatibilidad con reglas de límites para matrices de conectores.

• Hemos añadido compatibilidad con la opción Establecer coincidencia por defecto para matrices de conectores (compatible con conectores individuales y matrices de comodines).

• Ahora es posible añadir objetivos por defecto a conectores de matriz vacíos.

• Se ha evitado la actualización completa de la jerarquía y el panel Detalles al editar conectores de matriz.

• Hemos mejorado la resolución de conectores al duplicar módulos con módulos hijo.

• La selección de conectores ahora respeta correctamente las reglas de conectores en los detalles del módulo.

• Hemos corregido un error poco frecuente al editar las reglas de conectores en los módulos de rig de control.

Mejoras de duplicación

• Los rigs modulares ahora conservan los ajustes de entrada de duplicación.

• Los módulos de duplicación ahora reflejan correctamente las subjerarquías y la selección múltiple.

Herramientas de rigging de blendshapes del editor de esqueletos

Herramientas de rigging y blendshape

Las herramientas mejoradas de edición de Morph Target y rigging de cara de Unreal Engine 5.8 amplían el editor de esqueletos y el rig de control para mejorar la compatibilidad con los procesos de trabajo faciales basados en esculpido. Estas mejoras refuerzan la creación de blendshapes en el motor para personajes estilizados, mallas esqueléticas personalizadas y MetaHumans.

• Soporte para el bloqueo de articulaciones durante los procesos de trabajo de skinning.

• Selección y edición de elementos de malla para Morph Targets, con compatibilidad con selección suave.

• Atajo de teclado para reflejar (simetrizar) Morph Targets.

• Opción de menú para invertir Morph Targets.

• Nueva herramienta para dividir un Morph Target en dos usando un mapa de vértices.

• Deformador de retícula para la edición de Morph Targets.

• Secuenciación de comandos de geometría de posprocesamiento para la generación de LOD (que permite procesos de trabajo de estilo de subdivisión simplificados).

• Comportamiento más consistente del pincel de movimiento.

• Caída del pincel basada en la superficie.

Hemos realizado mejoras de facilidad de uso en las herramientas del editor de esqueletos para mejorar la estabilidad, la usabilidad y los procesos de trabajo de producción.

Selección

• Se mantiene la selección de vértices/componentes al salir de Aislar selección.

• Hacer clic en los botones con la tecla Ctrl pulsada cambia a un nuevo modo de selección.

• Hacer clic en los botones con la tecla Mayús pulsada modifica las selecciones existentes.

• Selecciona los huesos directamente desde el editor de componentes de pesos.

• Integración con el nuevo sistema de gizmos unificado para los editores de recursos.

Edición de skinning y pesos

• Se ha corregido un error por el que añadir pesos a los huesos no actualizaba correctamente el árbol del esqueleto.

• Hemos actualizado los widgets de rampa de pintura de pesos.

• Mejoras significativas en la herramienta de ponderación en línea con el desarrollo del proceso de trabajo de blendshape.

• Nueva funcionalidad de bloqueo de peso de piel.

  • Ajusta los pesos entre dos influencias sin afectar a las demás.

Edición de huesos

• Las cadenas de espejos ahora funcionan en cualquier parte del nombre del hueso.

• Soporte para reflejar articulaciones en todas las jerarquías.

• Hemos corregido problemas al renombrar los huesos.

• Hemos corregido la visibilidad de la selección de hijos en el árbol del esqueleto al contraer jerarquías.

• El menú desplegable del eje ya no permite elegir la opción Ninguno.

• Hemos añadido la visualización de depuración del eje de rotación local (LRA).

• Hemos añadido la opción Orientar solo los huesos seleccionados.

• Hemos añadido opciones de pegado especial para transferir articulaciones entre recursos.

• Hemos movido el menú Malla y huesos a la barra de herramientas superior del visor.

Edición de mallas y deformaciones

• Hemos añadido la edición básica de elementos de malla para mallas base y Morph Targets.

  • Actualmente se permite mover los elementos seleccionados.

  • Sienta las bases para ampliar las capacidades de edición.

Herramienta de reducción del número de huesos

• Nueva opción para eliminar huesos no utilizados de las mallas esqueléticas.

  • Elimina los huesos no referenciados por los pesos de piel.

  • Conserva la jerarquía padre hasta la raíz.

Animación con física del rig de control (beta)

La física del rig de control pasa a versión beta. Esta versión introduce una nueva funcionalidad basada en fuerzas y herramientas ampliadas para permitir más procesos de trabajo de animación basados en la física.

Los rigs de física ahora se comportan como rigs por capas, componiéndose de forma natural sobre la animación existente sin necesidad de una configuración de rig por capas explícita.

Estas actualizaciones mejoran tanto la creación de rigs como la usabilidad para el animador, especialmente dentro del rig de control modular.

Novedades:

• Compatibilidad con la aplicación de fuerzas directamente dentro de la física del rig de control.

• Permite animar fuerzas a lo largo del tiempo para un comportamiento dinámico del rig.

• Mejoras de rendimiento en tiempo de ejecución.

• Mejoras en la forma en que funciona el canal «alfa» para mezclar entre simulación y transparencia.

• Nuevos módulos de física para el rig de control modular que simplifican la configuración de la física.

• Nuevos rigs de utilidad de física en el kit del animador para ayudar a los animadores que trabajan con rigs basados en la física.

Estas mejoras amplían el rango creativo del rigging basado en la física.

Dinámicas: física basada en partículas para rig de control

Control Rig Dynamics es un nuevo solucionador ligero basado en partículas integrado directamente en el rig de control para simulaciones de personajes de alto rendimiento en el juego.

Este complemento está diseñado para ofrecer física rápida y configurable para elementos cosméticos como ropa, pelo y accesorios sin la sobrecarga de las capacidades completas de un motor físico.

Novedades:

• Nuevo complemento Control Rig Dynamics con un solucionador basado en partículas dedicado diseñado para un rendimiento en tiempo real.

• Mejora del rendimiento en tiempo de ejecución 5 veces con respecto a las soluciones de física existentes.

• Menos nodos y un proceso de trabajo de creación simplificado para reducir la complejidad de la configuración.

• Diseñado específicamente para cosméticos dentro del juego y recursos de personajes basados en la física.

Control Rig Dynamics ofrece a los animadores técnicos y especialistas un camino rápido y práctico para la simulación de personajes basada en la física.

Animación con controles directos de malla (experimental)

Los controles directos de malla (DMC) permiten que los controles del rig de control se representen directamente en secciones de la malla esquelética, lo que permite a los animadores manipular los rigs interactuando con la superficie del personaje en contexto. Esto introduce un nuevo paradigma de control que complementa los controles de forma estática tradicionales.

• Creación de grupos de control basados en mallas que funcionan como controles de rig de control.

• Selección y manipulación directas de regiones de malla en el visor y en Sequencer.

• Coexistencia con los controles de forma estática tradicionales para rigs donde los controles de malla no son apropiados (por ejemplo, colas, rigs mecánicos).

• Acción de hacer clic y arrastrar controlada por el visor para una manipulación más rápida de objetos y rigs.

Sistema de filtros y vinculación

Hemos sincronizado la selección en Sequencer, en el editor de curvas y en el visor.

• La selección está ahora completamente sincronizada en el visor, Sequencer y el editor de curvas. Es posible hacer clic en un control del personaje en el visor, elegir una pista en el esquematizador de Sequencer o seleccionar una curva en el editor de curvas: los tres paneles se actualizan juntos, al instante, cada vez.

• Todos los filtros y búsquedas también están vinculados ahora por defecto. Así que todo lo que hagas en uno de los editores se reflejará en el otro.

• El nuevo icono de vinculación permite decidir si quieres este comportamiento vinculado o no. Si está en estado desvinculado, puedes decidir qué estás viendo en cualquiera de las vistas.

Vista sencilla para Sequencer

Sequencer ahora puede contraerse hasta una vista simplificada para dar a los artistas la libertad de centrarse en partes del visor mientras crean animaciones.

• Se puede contraer la vista de Sequencer a una cronología simplificada con teclas para:

  • Mostrar contenido seleccionado y anclado (cualquier pista anclada + actores/controles seleccionados)

  • Mostrar contenido seleccionado (actores/controles seleccionados)

  • Mostrar todo (todo lo que hay en tu Sequencer)

• Ampliar la cronología simplificada a la vista completa de Sequencer en cualquier momento

  • Atajo de teclado para simplificar (ctrl-retroceso)

  • Atajo de teclado para ocultar la barra de herramientas (mayús-retroceso)

• Funciones

  • Seleccionar varios fotogramas clave

  • Mover, escalar, copiar/pegar, eliminar

  • Ajustar a fotograma y soporte para ajuste inteligente

• Barra de herramientas especializada para la creación de animaciones de personajes

  • Añadir/eliminar fotogramas intermedios

• Opciones

  • Bloques de color de cuadrícula

  • Mostrar/ocultar la barra de herramientas, los controles de transporte y el control deslizante de intervalo

  • Personalizar colores, aspecto y estilo

Baking automático para Sequencer

Hemos añadido nuevos procesos de trabajo para hacer bake automáticamente a secuencias de animación e intercambiar entre datos con bake y datos de rig de control en directo.

• Hemos añadido una nueva opción Configurar AutoBake al menú contextual.

• Aprovecha el proceso de trabajo de secuencias de animación vinculadas.

• Hemos añadido un icono de activación/desactivación rápida a todo lo que esté configurado con este autobake.

Mezcla de animación en Sequencer (experimental)

Al ampliar el trabajo realizado en la versión 5.6 sobre la transición fluida de la jugabilidad para las cinemáticas, el mezclador de animación mejora la capacidad de los artistas de cinemáticas para mezclar diferentes entradas de animación directamente dentro de Sequencer. Esto permite a los artistas de cinemáticas superponer y enmascarar animaciones de personajes para sus secuencias sin necesidad de un Blueprint de animación independiente ni espacios específicos. El mezclador de animación también es compatible con los procesos de trabajo del nuevo Unreal Animation Framework.

Con él, podrás hacer lo siguiente:

• Crea mezcladores de animación para asignarlos a espacios de Blueprint de animación o instancias de animación personalizadas.

• Crea capas de mezcla para superponer animación esquelética, rig de control o cualquier entrada que afecte a la pose esquelética en un orden de prioridad.

• Enmascarar huesos y curvas con un recurso de máscara de mezcla en cualquier capa de mezcla.

• Añadir modificadores a cualquier mezclador, capa o sección para hacer coincidir huesos, desplazar el movimiento de la raíz, reflejar y mucho más.

• Añadir transiciones como fundido cruzado o mezcla con parada entre animaciones.

Definición de pies para reposicionamiento

En Unreal Engine 5.8, seguimos mejorando el reposicionador de IK, transfiriendo animaciones de pies a una amplia variedad de personajes. Los artistas que se centran tanto en el reposicionamiento en tiempo de ejecución como en los procesos de trabajo de captura de movimiento pueden utilizar estas nuevas capacidades para obtener resultados excelentes al reposicionar a diferentes personajes. Para obtener más información, consulta Ajustes de los pies en la documentación sobre la pila de operaciones del reorientador.

• Define un plano de los pies y los dedos del personaje objetivo para transferencias mejor controladas.

• Hemos actualizado las plantillas de reposicionamiento automático para cadenas de reposicionamiento actualizadas para la definición de pies.

• Hemos añadido control para evitar la amortiguación del movimiento vertical de la pelvis en personajes más bajos.

• Las funciones Mezclar con origen, Objetivos de escalado y Objetivos de desfase se dividen en la pila de operaciones de IK para mayor flexibilidad en la ordenación.

Conjuntos de anulaciones de reposicionamiento

Para los procesos de trabajo de reposicionamiento de jugabilidad, los conjuntos de anulaciones de reposicionamiento permiten que un solo recurso de reposicionador de IK gestione diferentes relaciones de reposicionamiento sin necesidad de crear recursos adicionales o lógica de Blueprint adicional. Para obtener más información, consulta Conjuntos de anulación en la documentación sobre el redireccionamiento de rigs de IK.

• Crea una colección de operaciones y sus propiedades para almacenarlas como un conjunto de anulaciones de reposicionamiento en el recurso de reposicionamiento.

• Añade y hereda de conjuntos de anulaciones existentes para reposicionamientos más flexibles.

• Enlaza operaciones o sus propiedades a una curva de animación o a una variable en un conjunto de anulaciones.

• Establece qué conjunto de anulaciones utilizar al ejecutar el reposicionador de IK para reposicionamiento en tiempo de ejecución o reposicionamiento sin conexión.

Para obtener más información sobre esta función, consulta IK Rig Retargeting.

Herramienta de reposicionamiento de animaciones RigMapper (beta)

Seguimos mejorando el mapeador de rigs con mejores capacidades de creación de grafos de nodos y una mayor integración dentro del reposicionador de IK para gestionar transferencias de animación facial más completas. Permite transferir movimiento entre diferentes configuraciones de personajes, como aplicar animaciones de ARKit a MetaHumans o usar animaciones de MetaHuman Animator (MHA) en personajes de ARKit.

Hemos ampliado las curvas de reasignación a una pila de operaciones para gestionar todas las operaciones de reposicionamiento de curvas en orden de prioridad.

• El proceso de trabajo anterior de la versión 5.7 ahora es compatible con la operación de mapeador de rigs de datos de usuario que gestiona la evaluación del mapeador de rigs en orden de matriz.

• Hemos proporcionado una nueva operación de mapeador de rigs único para que los usuarios asignen una única definición de mapeador de rigs.

  • Crea varias operaciones individuales de mapeador de rigs en la pila de curvas de reasignación para determinar el orden de prioridad de evaluación.

• Hemos ampliado los comportamientos del grafo de nodos del editor de definición del mapeador de rigs para mejorar la experiencia de usuario:

  • Crea nuevos nodos desde el menú contextual o arrastrando y soltando pines.

  • Arrastra y conecta pines de nodo a nodo con reconocimiento contextual y direccional.

  • Mueve y organiza grupos de nodos.

  • Hemos actualizado el panel Detalles para cada nodo con las ediciones en tiempo real visibles en el grafo.

Mutable

En UE 5.8, la función mutable está lista para producción con mejoras en la estabilidad, rendimiento y canalización.

Los objetos personalizables sin datos permiten la gestión de parámetros en tiempo de ejecución para una iteración más rápida, reutilización de grafos y una mejor aplicación de parches. Están optimizados para operaciones de malla y composición de texturas sencilla.

Los procesos de trabajo sin datos permiten evaluar las entradas de parámetros en tiempo de ejecución en lugar de en tiempo de compilación, lo que reduce significativamente el coste de iteración al tiempo que mantiene la compatibilidad con los sistemas de empaquetado y cifrado de Unreal Engine.

El pin de malla esquelética simplifica los procesos de trabajo comunes al ofrecer a los usuarios una forma de trabajar a nivel de malla esquelética en lugar de secciones de malla.

Hemos realizado mejoras de rendimiento en todos los aspectos, incluidas actualizaciones paralelas para acelerar el rendimiento de generación de multitudes, la reducción de la carga de trabajo del subproceso del juego y la optimización de las operaciones de malla y textura.

Para obtener más información sobre esta función, consulta Generación de mallas esqueléticas mutables.

Transmisión de vídeo de Live Link Face

Live Link Face en iOS y Android ahora transmite vídeo en tiempo real directamente a Unreal Engine, lo que permite a los supervisores y directores en el set supervisar la actuación de un actor mientras se produce. La transmisión de vídeo se integra con los perfiles multimedia de Unreal Engine, lo que permite revisar el metraje capturado junto con la animación resuelta. En los dispositivos más recientes, la transmisión de vídeo y la resolución de animación en tiempo real se ejecutan simultáneamente. La transmisión está diseñada para funcionar de forma fiable en redes wifi con bajo ancho de banda y alta latencia.

MetaHuman

Puebla tu mundo con MetaHumans

Ensambla instancias optimizadas de personajes MetaHuman para crear multitudes compatibles con Mass, que pueden ir desde decenas hasta miles de personajes. El nuevo complemento experimental MetaHuman Crowd proporciona un proceso de ensamblaje completo con transiciones fluidas entre actores individuales de forma muy realista y mallas esqueléticas instanciadas de menor fidelidad en función de la distancia de la cámara.

Características principales:

• Construye colecciones de componentes modulares (cabeza, cuerpo, pelo, ropa) y compónlas de forma manual o procedimental usando Blueprints.

• Texturas faciales optimizadas que mantienen la fidelidad visual con una menor ocupación de memoria.

• Animación aplicada usando Unreal Animation Framework o secuencias simples en función de la distancia.

• Simulado con Mass, renderizado usando Nanite o sistemas LOD dinámicos.

• La configuración del proyecto de ejemplo está disponible por separado y funciona en todas las plataformas de destino de Unreal Engine.

Para obtener más información sobre esta función, consulta multitudes de MetaHumans.

MetaHuman Creator

Cómo convertir mallas de cuerpo completo en un personaje MetaHuman listo para animar

Convierte cualquier malla de personaje humano con topología arbitraria en un MetaHuman completamente articulado en un único proceso de trabajo. Este proceso de malla a MetaHuman mejorado adapta la cabeza y el cuerpo simultáneamente, acepta mallas de entrada de cualquier topología y genera automáticamente resultados basados en la base de datos de MetaHuman.

Características principales:

• Ajuste de cabeza y cuerpo combinados en un solo paso.

• Acepta como entrada una malla de cabeza o cuerpo de cualquier topología.

• Resultados automáticos para personajes humanos con control manual disponible para correcciones técnicas.

• Idóneo para personajes creados a partir de escaneos, herramientas externas de GenAI/DCC o conversiones de personajes existentes.

Para obtener más información sobre esta función, consulta Desde malla personalizada. 

Logra mayor fidelidad o estilos visuales alternativos con control total de las texturas sin hacer bake

Monta personajes de MetaHuman sin materiales ni texturas precalculados. Esto permite un control detallado del desarrollo visual y las texturas para los artistas que quieren lograr un aspecto específico. Crea recursos de textura y material sin procesar usando los editores estándar de Unreal Engine o exporta texturas a herramientas DCC externas. Se proporcionan opciones para sobrescribir con texturas y materiales personalizados por el usuario en MetaHuman Creator.

Características principales:

• Control total sobre texturas y materiales para una fidelidad visual o estilos estéticos personalizados.

• Aplica materiales y texturas sin procesar modificados como anulaciones en MetaHuman Creator para que los usuarios sigan beneficiándose del proceso de bake de materiales al ejecutar montajes por defecto.

• Proceso de trabajo estándar de Unreal Engine que utiliza editores de recursos conocidos.

• Funcionalidades de exportación para la autoría en DCC externos.

Caso de uso: permite aspectos que van más allá de las capacidades integradas de MetaHuman Creator al tiempo que se mantiene la optimización del rendimiento.

Para obtener más información, consulta Materiales sin bake. 

Obtén una vista previa de los personajes MetaHuman usando tu configuración de iluminación

Crea escenas de iluminación personalizadas en MetaHuman Creator para previsualizar personajes en el contexto de tu entorno objetivo. Define configuraciones de iluminación usando plantillas que incluyan hemisferios de cúpula del cielo, volúmenes de posprocesamiento y grupos de luces, y luego usa estas escenas personalizadas para validar la fidelidad visual durante la creación.

Características principales:

• Previsualiza los personajes en tu entorno de iluminación objetivo directamente en MetaHuman Creator.

• Acorta la distancia entre las vistas previas de MetaHuman Creator y el aspecto en el nivel.

• Inspecciona y modifica los ajustes de renderizado del visor para tener un control preciso.

• Idóneo para artistas de personajes, artistas de iluminación y equipos de desarrollo visual.

• El visor de MetaHuman Creator ahora también es totalmente compatible con Lumen.

Para obtener más información, consulta Custom Lighting Scenarios and Render Settings. 

MetaHuman Animator

Cómo capturar animación corporal desde una sola cámara

​Captura el rendimiento del cuerpo, o de la cara y el cuerpo, para un solo actor desde una sola cámara. Esta nueva capacidad experimental amplía la accesibilidad de MetaHuman Animator de las caras a los cuerpos, eliminando la fase de captura de movimiento óptico como barrera para los creadores de contenido. Disponible como un complemento independiente en Fab e integrado directamente en MetaHuman Animator, con las apps móviles de Live Link Face actualizadas para ser compatibles con la captura corporal y la facial.

Características principales:

• Captura corporal para un solo actor desde una sola cámara, con captura facial simultánea opcional.

• Solución sin conexión para resultados muy realistas.

• Compatible con una amplia gama de hardware de consumo, incluidas cámaras web y teléfonos inteligentes compatibles

• Disponible como un complemento independiente de captura de movimiento sin marcadores de MetaHuman Animator a través de Fab e integrado como una capacidad de MetaHuman Animator dentro de Unreal Engine.

• Pautas ampliadas de captura incluidas en la documentación.

Para obtener más información sobre esta función, consulta Animation from Mono Video Capture. 

Procesamiento por lotes optimizado de MetaHuman Animator

MetaHuman Animator ofrece una API mejorada para procesar por lotes grandes volúmenes de datos de rendimiento capturados. El proceso de trabajo actualizado lo abarca todo de principio a fin, desde la resolución hasta la revisión de la animación y la exportación. Se incluirán ejemplos de blueprints de referencia para ampliar o personalizar tu proceso específico.

MetaHuman Animator disponible en Linux y macOS

MetaHuman Animator ahora es compatible con Linux y macOS, ampliando así la disponibilidad del editor de Unreal Engine y MetaHuman Creator en más plataformas. Puedes generar animación facial a partir de la captura de rendimiento en Linux y macOS sin necesidad de acceder a un equipo con Windows. Sin embargo, las características de animación corporal solo están disponibles actualmente en Windows.

Características principales:

• Funcionalidad facial de MetaHuman Animator sin conexión y en tiempo real disponible en Linux y macOS.

• Paridad de plataforma con el editor de Unreal Engine y MetaHuman Creator.

• La animación facial en tiempo real en Linux solo está disponible usando Live Link Face.

Mejora de la calidad de curva y resolución de MetaHuman Animator

Los nuevos modelos de animación en tiempo real y sin conexión ofrecen una mayor calidad de resolución en una gama más amplia de condiciones de captura, incluidos ángulos de cámara variados, distorsión de lente e iluminación infrarroja. La animación basada en sonido se beneficia de un nuevo modelo en tiempo real. La salida de curva es más fácil de usar para los animadores, con una activación más limpia en las poses clave que facilita la edición y el perfeccionamiento.

Creación de mundos

Terreno de malla (experimental)

Una solución de terreno basada en mallas de última generación para admitir mundos grandes utilizando modelado 3D, capas, textura virtual, herramientas de editor genéricas, teselación variable y Nanite. Nuestro objetivo con esta función es reemplazar y eliminar las limitaciones típicas de la solución de paisaje solo de campo de altura actual en Unreal Engine.

Para obtener más información acerca de esta función, consulta Terreno de malla.

Fast Geometry Streaming (experimental)

En el complemento Fast Geometry Streaming, incluimos varias mejoras nuevas para mejorar la velocidad, la estabilidad y la compatibilidad con casos de uso, respecto a la versión inicial 5.6.

• Hemos añadido compatibilidad con los componentes de luces de calcomanía, puntuales, focales y rectangulares.

• Hemos añadido compatibilidad con texturas de pintura de malla en el componente de malla estática.

• Hemos añadido más funcionalidad en IPhysicsBodyInstanceOwnerResolver:

  • GetCollisionObjectType

  • GetCollisionEnabled

  • GetTransform

  • ObtenerObjetoFisicaPorId

  • GetAllPhysicsObjects

• Hemos corregido los componentes no primitivos que se ignoraron en el proceso de transformación.

• Hemos corregido que FastGeoContainer no contuviera ninguna física.

• FastGeoStreaming.ini ahora es DefaultFastGeoStreaming.ini.

• La movilidad del componente raíz se conserva ahora cuando el transformador de celdas de tiempo de ejecución de FastGeo crea un nuevo componente raíz de reemplazo para un componente transformado.

• Hemos corregido que los componentes primitivos se mostraran incorrectamente al ejecutar PIE y expulsar al jugador.

• Hemos corregido un problema de traducción automática en el editor.

• Hemos eliminado EProxyCreationState::Pending y UFastGeoComponentEditorProxy porque no se utilizaban.

• Hemos reestructurado el sistema para simplificar y aclarar la interfaz del componente de geometría rápida.

• Hemos corregido que WorldPartitionRuntimeCellTransformerISM duplicara instancias para actores de Blueprint que no eran completamente transformables.

Múltiples correcciones adicionales para fallos, subprocesamiento, interbloqueos e inicialización en esta versión experimental.

Información de World Partition

Hemos añadido herramientas de depuración de transmisión de World Partition a Unreal Insights y Unreal Editor, lo que permite el análisis por celda y la reproducción de sesiones.

Experiencia de usuario de HLOD

Hemos realizado las siguientes mejoras en los niveles de detalle jerárquicos (HLOD) de World Partition.

Funcionalidad:

• Hemos añadido una operación de eliminación por lotes para reducir la sobrecarga del control de versiones.

• Ahora es compatible con HLOD independientes al colocar varias instancias del mismo nivel de subdivisión de World Partition.

• Hemos añadido una opción heurística de diferencia perceptiva para actualizar los HLOD solo cuando sea necesario.

• Hemos añadido compatibilidad con actores nuevos y eliminados al compilar HLOD directamente desde un nivel en el editor.

Experiencia de usuario:

• Compilación de HLOD para la selección.

• Construcción de HLOD para la región seleccionada a través del editor de World Partition.

Generación procedimental de contenido (PCG)

Edición manual

En UE 5.8, hemos añadido edición manual no destructiva de datos y artefactos de generación procedimental de contenido mediante selección, exclusión, modificación y compatibilidad con la restauración de datos.

Los nodos individuales de los grafos se pueden marcar para editarlos manual o anularlos temporalmente. Una nueva ventana de anulaciones de datos muestra todas las anulaciones aplicadas a un nodo inspeccionado.

Atributos complejos

Ahora se admite el uso de matrices, estructuras, conjuntos y mapas como valores de atributos de metadatos y anulaciones. Esto incluye varias operaciones para extraer datos en estructuras y matrices, así como operaciones con matrices.

Los nuevos nodos Crear constante compleja y Añadir constante compleja están disponibles para su uso en grafos de generación procedimental de contenido, además de los parámetros de grafo con tipos complejos.

Subgrafos incrustados

Hemos añadido compatibilidad para crear subgrafos personalizados, similares a las funciones de Blueprint, almacenados y editados directamente dentro de un grafo de generación procedimental de contenido.

Editor de parámetros de grafo

Ahora es posible categorizar, ordenar, agrupar y describir los parámetros de generación procedimental de contenido en la nueva herramienta de edición de jerarquía de parámetros.

Rendimiento de generación procedimental de contenido

Tiempo de ejecución:

• La dispersión en tiempo de ejecución de la GPU de generación procedimental de contenido está ahora dentro del mismo rango de rendimiento que el sistema de hierba de GPU del paisaje, y se ha sometido a pruebas de estrés en todas las plataformas.

• Generación en tiempo de ejecución sin actores ni componentes

Editor:

• Se han añadido mejoras de CRC y almacenamiento en caché al ejecutar un grafo, lo que reduce la posible invalidación de la caché con mayor eficiencia.

• Lógica de reutilización de ISM mejorada al generar grandes conjuntos de mallas estáticas.

• Hemos realizado mejoras en la ejecución y programación de grafos, eliminando conflictos y cuellos de botella.

Experiencia de usuario de generación procedimental de contenido

Como parte de las continuas mejoras en la experiencia de usuario al trabajar con generación procedimental de contenido, estos son los últimos cambios:

• Filtro por contexto: al añadir un nuevo nodo arrastrando desde cualquier pin con tipo establecido, la paleta de nodos se filtra automáticamente para mostrar las operaciones compatibles, con opciones para incluir conversiones o desactivar el filtrado por completo.

• Kernels HLSL: ahora puedes crear atributos directamente desde el kernel HLSL en lugar de en los ajustes del nodo.

• Editor HLSL: ahora puedes establecer el tamaño de fuente.

• Visor de datos: ahora puedes editar las anulaciones manuales desde el visor de datos del editor de generación procedimental de contenido.

Nodos y operadores de generación procedimental de contenido

Con Unreal Engine 5.8, también introducimos varios elementos de generación procedimental de contenido nativos y nuevas opciones, entre las que se incluyen:

• Operaciones con matrices de metadatos: las operaciones más útiles para matrices (crear, añadir, añadir de forma única, comprobar si contiene, etc.).

• Alinear puntos: ajusta la posición y rotación de los puntos a los límites de otro punto en cualquier eje y referencia espacial.

• Scene Capture: el nodo Scene Capture ahora es compatible con transformaciones de entrada, lo que permite realizar capturas desde cualquier dirección y añade mayor flexibilidad para el muestreo de la GPU.

• Create / Add Complex Constant: utiliza estos nodos para crear o añadir cualquier tipo de atributo complejo directamente en el grafo.

• Aplicar spline al componente: escribe los datos de la spline de generación procedimental de contenido en una referencia de componente de spline existente. Útil para aplicar cambios en splines existentes en el editor.

• Teletransportar actores y componentes: proporciona un método para aplicar una transformación a cualquier referencia de actor o componente en el mundo. Útil para un nuevo flujo de trabajo de generación procedimental de contenido basado en niveles para aplicar una operación instantánea en el editor.

• Obtener clase desde atributo: obtiene la clase a partir de una referencia de objeto flexible y la devuelve como un atributo.

• Obtener cámaras del editor: devuelve las cámaras del visor del editor visibles actualmente como puntos para usarlas en varias operaciones en el editor.

• Establecer materiales en malla dinámica: aplica material a los datos de la malla dinámica.

Procedural Vegetation Editor (experimental)

Procedural Vegetation Editor es un complemento experimental que permite crear y editar mallas de vegetación, compatible con el follaje de Nanite, directamente en Unreal Engine. Con UE 5.8, introducimos una nueva funcionalidad Core que amplía enormemente las capacidades de JcE, permitiendo el crecimiento directamente en el editor sin necesidad de recetas importadas, junto con muchas otras mejoras.

• Nodo Growth

• Generador de valor de inicialización

• Extracción esquelética de malla 3D o imagen/atlas 2D

• Fusión de foliaje

• Evasión de objetos y tallado

• Recorte: bucles de rama, teselación de desplazamiento

• Mejoras en el creador de mallas

• Modos de visualización

• Componedor de materiales de tronco

Para obtener más información sobre esta función, consulta Editor de vegetación procedimental.

Marco

Estados de inicio y extensiones del compilador de StateTree

StateTree es todavía más flexible en UE 5.8.

Hemos mejorado los procesos de trabajo de creación; los árboles ahora pueden definir su estado inicial.

Un nuevo gestor de compiladores ayuda a agilizar la iteración y el editor ahora hace un seguimiento de cuándo los árboles están desactualizados para que quede más claro cuándo es necesario recompilar.

La vinculación de propiedades es más robusta y ahora permite revertir la vinculación fácilmente, lo que facilita el movimiento de datos de una tarea completada a otra.

Para obtener más información sobre esta función, consulta Statetree.

Marco de Mass: más rápido, modular y diseñado para escalar

Mass, nuestro sistema de entidades orientado a datos, se renueva por completo.

Mass Signal ahora forma parte del motor Core, y las entidades pueden crearse fuera del subproceso de juego gracias a la programación sin bloqueo basada en arquetipos. Un nuevo sistema de fragmentos dispersos/virtuales reduce el uso de memoria y permite añadir o eliminar fragmentos y etiquetas opcionales sin provocar cambios costosos en los arquetipos.

Hemos renovado por completo la ejecución del procesador Mass y la resolución de dependencias para aprovechar mejor las CPU multinúcleo, lo que genera una ejecución más segura y rápida en hardware moderno. Esto se apoya en una programación más granular y notificaciones de observador seguras para subprocesos.

Un nuevo módulo MassCore simplifica aún más la adopción al separar el sistema de entidades central de la pila de MassGameplay más amplia.

Para obtener más información sobre esta función, consulta MassEntity.

Navegación: control por malla de superficies transitables

Las mallas estáticas ahora pueden definir sus propias áreas transitables durante la generación de la malla de navegación, lo que da a los diseñadores más control sobre cómo la IA navega por el mundo. Puedes asignar costes de zona por malla a la geometría estática; por ejemplo, marcar un sofá para que la IA prefiera rodearlo en lugar de pasar por encima.

Esto se habilita por malla a través de una marca y un ajuste de clase de zona en NavCollision, con asistencia a través del proceso de generación de Recast completa.

Iris: sistema de replicación preparado para producción

Iris ya está listo para producción para los titulares de licencia en UE 5.8.

Junto con ese hito, añadimos una serie de mejoras que se centran en la estabilidad y la usabilidad diaria. Hemos mejorado la gestión de desajustes de protocolo para que los clientes reciban errores más claros cuando estén desincronizados con el servidor, y las nuevas advertencias ayudan a detectar antes los problemas del ciclo de vida de los objetos. La serialización, la gestión de la distancia de eliminación y los diagnósticos se han perfeccionado, y la detección de DoS de RPC se ha vuelto a habilitar.

Iris también se acerca más a la dirección general del motor, con asistencia añadida para la integración de Scene Graph y el enrutamiento RPC de RemoteObjects.

Para obtener más información sobre esta función, consulta Sistema de replicación Iris.

Mover: física, animación y redes mejoradas

Mover recibe una amplia actualización en el movimiento Core, las redes, la animación y ChaosMover.

Los modos de movimiento de Core reciben una amplia gama de correcciones y mejoras, incluida compatibilidad con NavWalking para desvío de multitudes, un mejor movimiento basado para escenarios como plataformas móviles o barcos que se balancean, y una mejor gestión del movimiento raíz y del montaje.

Los movimientos por capas ahora se pueden programar con antelación para una mejor sincronización, mientras que la compatibilidad con la reversión y la predicción se ha ampliado.

La red también mejora con asistencia opcional de replicación de Iris en la predicción de red y dilación de tiempo adaptativa para reducir la anticipación del cliente.

ChaosMover añade predicción de trayectoria para procesos de trabajo de coincidencia de movimiento, una integración más profunda de Chaos Visual Debugger y un mayor soporte para montajes basados en simulación, movimientos por capas, etiquetas de jugabilidad y efectos de movimiento instantáneos.

Juntos, estos cambios continúan el trabajo arquitectónico para sacar a Mover del estado experimental al tiempo que mejoran la estabilidad en los modos de movimiento, la predicción, la resimulación y los procesos de trabajo basados en animación.

Sistema de entrada unificado: Common UI y Enhanced Input

Hemos optimizado los procesos de trabajo de entrada en UE 5.8 con la unificación de Enhanced Input y Common Input/IU. Esto simplifica la gestión de entradas multiplataforma, elimina la necesidad de recursos de datos duplicados y hace que la depuración sea más sencilla.

La actualización también incluye una serie de mejoras en la gestión de entradas, como un procesamiento de eventos más fiable, un mejor comportamiento de vinculación de widgets, compatibilidad ampliada con teclas virtuales y correcciones para casos extremos de activadores.

Las nuevas herramientas, como un depurador de entradas para la IU de Enhanced Input y la extensibilidad añadida, facilitan la creación y la solución de problemas en experiencias basadas en entradas.

Iteración del desarrollador

Cooking incremental (beta)

EL cooking incremental sigue siendo una característica beta en UE 5.8. Las mejoras en el determinismo reducen aún más la necesidad de volver a compilar recursos no modificados, especialmente con DDC y variaciones de datos estructurados.

El cooking incremental, además, permite iterar más rápido en los dispositivos de destino, reduciendo así el tiempo total de cooking. Los procesos de cooking analizan automáticamente los cambios en los recursos respecto a los resultados almacenados en ZenServer y solo hacen cook de las nuevas actualizaciones realizadas en los recursos de tu proyecto. Esto funciona en todos los recursos nativos del motor, entre los que se incluyen los blueprints y las teselas de World Partition.

Zenserver como almacén de salida cooked

La función Zenserver como almacén de salida cooked ahora está habilitada de forma predeterminada. Esto también en la retransmisión de Zenserver que utilizan los flujos de trabajo de Unreal Editor automáticamente al iniciar el juego o el cliente en los dispositivos. Además, los archivos contenedores para los elementos marcados para implementación (pak/iostore) siguen estando disponibles y son compatibles con los flujos de trabajo sin iteración. Para garantizar que funcione con dispositivos remotos, Zenserver responde a las solicitudes remotas, pero solo si proporcionan una clave pregenerada para la autorización. 

• Los proyectos existentes que tengan deshabilitado el uso de Zen Store en la configuración del proyecto no utilizarán Zenserver como almacén de salida cooked. Tendrán que cambiar manualmente el ajuste en la configuración del proyecto para habilitarlo.

• Para casos de uso de desarrollo profesional, los proyectos deben establecer LimitProcessLifetime=false en la sección Zen.AutoLaunch del archivo de configuración DefaultEngine.ini para que ZenServer no se inicie y se detenga con frecuencia. Esto requiere tener en cuenta los procesos automatizados o de compilación para garantizar que Zenserver siga ejecutándose de forma que no interfiera con los procesos automatizados o de compilación.

• La clave de configuración AllowRemoteNetworkService se ha renombrado y se ha cambiado a RemoteNetworkService. Ahora no acepta los booleanos true/false, sino que utiliza los siguientes valores:

  • «None» rechaza las solicitudes remotas al Zenserver local iniciado por UE.

  • «Unsecured» acepta solicitudes remotas al Zenserver local iniciado por UE si contienen una clave de autorización en su encabezado que coincida con una clave generada por UE.

  • «GeneratedStaticKey» es el valor predeterminado.

Para obtener más información sobre este tema, consulta Zenserver como almacén de salida cooked y Retransmisión de Zenserver.

Informes de rendimiento de Horde (experimental)

Las mejoras en las herramientas de análisis de Horde continúan en UE 5.8 como una característica experimental con mejoras en la experiencia de usuario en el panel para los intervalos de trabajo (CPU, uso de memoria) y la observabilidad del estado de los trabajos.

También hemos introducido una nueva vista en Horde que muestra las tendencias de tiempo de ejecución generadas por el marco de pruebas de rendimiento automatizadas (APT) y la herramienta de informes de rendimiento (csvprofilers), destacando métricas clave como los tiempos de GPU/CPU, el uso máximo de memoria y los informes de interrupciones para poder detectar regresiones. Esto actualmente depende de que los usuarios tengan su propio modelo de almacenamiento de base de datos.

Audio

Audio Insights (listo para producción)

Audio Insights ha recibido una gran actualización con nuevas características y mejoras en UE 5.8, ampliando sus capacidades de diagnóstico en la medición de intensidad, la visualización del flujo de señales, la monitorización de eventos en directo y el trazado de datos, junto con numerosas mejoras de estabilidad, experiencia de usuario y una app independiente.

• Medición de intensidad: un medidor de intensidad específico rastrea los valores de intensidad momentánea, a corto plazo e integrada, junto con el rango de intensidad y los valores de pico real, los valores máximos objetivo y los indicadores de recorte, procesados en el motor y transmitidos tanto al editor como a la app independiente.

• Visualizador de flujo de señales: una nueva pestaña que traza el grafo de la señal de sonido instantánea desde su origen a través de las submmezclas hasta el dispositivo de salida, mostrando los valores de mezcla en cada etapa para encontrar problemas de atenuación o enrutamiento. Muestra también los datos en caché para análisis forense sin conexión.

• Controles de caché de cronología: controles dinámicos sobre el cabezal de reproducción de la pantalla que sincronizan la visualización de datos para una única marca de tiempo en varios paneles de datos.

• Visibilidad del bus de control y la modulación: la pestaña Bus de control ahora muestra las mezclas de bus de control como fuentes junto con los buses individuales, y la pestaña Modulación filtra solo las columnas de bus de control activas para reducir el ruido.

• Monitorización en tiempo real: Audio Insights ahora puede mostrar datos de trazado en tiempo real sin guardar un archivo de trazado, eliminando las preocupaciones sobre el espacio en disco durante largas sesiones de monitorización. Se admiten tanto las versiones de editor como las independientes (a través de Unreal Insights).

• Registro de eventos: una nueva pestaña acoplable Eventos proporciona un registro cronológico desplazable y en directo de inicio y detención de sonido y otros eventos de sonido. Los eventos se pueden filtrar por texto, seleccionar por hora para sincronizar otras visualizaciones y hacer doble clic en ellos para acceder directamente a la instancia correspondiente en la pestaña Sonidos.

• Trazados: una pestaña Trazados dedicada consolida el trazado de parámetros por sonido con renderizado mejorado, continuidad de color corregida en las pausas de trazado y artefactos de visualización corregidos en modo independiente.

• Mejoras en el caché y el funcionamiento independiente: el gestor de caché de datos ahora funciona en sesiones independientes, los datos de trazado pueden guardarse en un archivo directamente desde las cachés del panel y el tamaño de la caché ahora es configurable por el usuario a través de los ajustes.

Para obtener más información sobre esta función, consulta Audio Insights.

Subtítulos de audio (beta)

Los subtítulos de audio son necesarios para la accesibilidad: sistemas de diálogo, subtítulos opcionales y chat de voz. Hemos ascendido el complemento de estado experimental a beta, lo que refleja su mayor estabilidad y la exhaustividad de sus funciones.

• Los subtítulos se muestran ahora correctamente para todos los tipos de sonido activados dentro de un grafo de MetaSound, incluidos los MetaSounds anidados.

• Ahora se admiten las anulaciones de visualización de subtítulos por plataforma, lo que permite una colocación y un estilo de widgets diferentes para plataformas como dispositivos móviles o Nintendo Switch, donde la disposición de la pantalla es diferente.

• Los subtítulos de una secuencia de nivel ahora se pueden previsualizar directamente en el editor sin entrar en Reproducir en el editor (PIE), lo que acelera la iteración en la temporización de los subtítulos.

• La duración de los subtítulos ahora se puede anular por configuración regional, utilizando automáticamente la duración de la onda de sonido específica de la configuración regional cuando hay un recurso localizado presente.

• Una nueva función de C++ y Blueprint QueueSingleSubtitle reemplaza a la antigua QueueSubtitle (ahora obsoleta). Una función complementaria, QueueSubtitlesFromAsset, pone en cola todas las líneas de subtítulos almacenadas en un recurso en una única llamada con los desfases de tiempo correctos aplicados automáticamente.

• Hemos añadido un campo de comentarios a los recursos de subtítulos para notas internas visibles en el editor, pero que no se muestran en tiempo de ejecución.

• Varias mejoras de experiencia de usuario y correcciones de errores.

Editor de formas de onda (beta)

Los diseñadores de sonido necesitan poder acceder a potentes herramientas de edición sin salir del motor. Seguimos mejorando el editor de formas de onda con un mayor control sobre las transiciones y mejoras en el proceso de trabajo para reducir las idas y venidas en herramientas de audio externas.

• Los fundidos ahora están desvinculados del recorte. Una nueva transformación de fundido permite colocar cualquier número de regiones de fundido independientes, cada una con su propio fundido de entrada y salida, en cualquier parte de la forma de onda, de manera totalmente independiente de la región TrimFade. Los tipos de curva de aparición y desaparición de recorte también se pueden configurar ahora directamente desde la barra de herramientas, con menús contextuales al hacer clic derecho en los controladores de aparición/desaparición que ofrecen opciones adicionales de forma de curva. Desplazarse por un controlador de fundido ajusta la pendiente de la curva.

• La opción Reimportar ya está disponible en la barra de herramientas del editor, con tres modos: reimportar y sobrescribir transformaciones (incluidos los datos de marcadores y regiones de bucle de los fragmentos de señal y muestra), reimportar manteniendo las transformaciones existentes o reimportar desde un archivo completamente nuevo.

• Un nuevo ajuste Iniciar transformaciones te ayuda a preconfigurar qué transformaciones se aplican automáticamente al abrir una onda de sonido que no tiene ninguna. Esto elimina los pasos de configuración repetitivos para los procesos de trabajo de edición estándar.

• Cuando se aplican cambios de transformación, los metadatos de LUFS y pico de muestra de la onda de sonido se actualizan automáticamente para reflejar la forma de onda transformada, manteniendo la precisión de los metadatos del recurso sin necesidad de una actualización manual.

• Atajos de teclado adicionales para la navegación por marcadores:

  • Mueve el cabezal de reproducción hasta el siguiente marcador.

  • F/B selecciona el siguiente/anterior marcador de bucle.

  • H ajusta el cabezal de reproducción al corte cero más cercano.

  • Intro detiene la reproducción y vuelve al principio.

  • Mayús+Espacio restablece el cabezal de reproducción al principio del archivo sin afectar al estado de reproducción.

• Muchas otras mejoras de usabilidad, experiencia de usuario e IU.

Para empezar a usar esta función, consulta Inicio rápido del editor de tipos de onda.

Configuración de nodos MetaSound (experimental)

La configuración de nodos MetaSound, introducida en UE 5.7, se amplía ahora en UE 5.8 con nuevas herramientas que reducen el código repetitivo para los desarrolladores y mejoran la experiencia de edición para los diseñadores.

• Configuración de nodos de interfaz dinámica: una nueva estructura FMetaSoundDynamicInterfaceNodeConfiguration integrada gestiona automáticamente el recuento de instancias de subinterfaz y la selección de tipos de variantes basándose en la definición FClassInterface de un nodo. Los desarrolladores ya no necesitan escribir estructuras de configuración personalizadas por nodo para el caso común de exponer recuentos de subinterfaz o tipos de pin variantes. El panel Detalles ahora muestra estos controles automáticamente como menús desplegables y campos de recuento.

• API de transformación de actualización de nodos: una nueva API más estructurada para crear secuencias de comandos de actualización de nodos permite a los desarrolladores controlar de forma precisa cómo migran los nodos cuando su interfaz cambia entre versiones principales. La lógica de actualización personalizada se asocia ahora a una versión principal específica y se ejecuta después de que se hayan aplicado las actualizaciones de versión menor y de interfaz, lo que garantiza un orden predecible. Un ejemplo de migración —actualizar el ancho de banda por defecto del filtro bicuad de 1.0 a 2.0 para los nodos recién colocados mientras se conserva el valor por defecto heredado para el contenido existente— demuestra el patrón.

• Serialización de disposición de subinterfaz: la información de disposición de subinterfaz se reconstituye correctamente al deserializar MetaSounds, lo que resuelve los casos en los que se producían colisiones de nombres de vértices y pérdida de disposición en determinadas plataformas.

• Estabilidad de la API: FClassInterface deja de ser experimental en UE 5.8. FNodeClassMetadata::DefaultInterface ahora acepta FClassInterface directamente (reemplazando FVertexInterface), y los ayudantes de creación de nodos de entrada/salida obsoletos se han eliminado de IDataTypeRegistry. Los desarrolladores que creen integraciones de configuración de nodos pueden considerar esto como la superficie de API pública estable en el futuro.

Plantillas de MetaSound (experimental)

Plantillas de MetaSound es una nueva característica experimental en UE 5.8 que proporciona a los programadores de audio los medios para crear una lógica de generación de MetaSound reutilizable y basada en propiedades que los diseñadores de sonido pueden utilizar, lo que permite una iteración rápida sin tener que tocar el grafo.

• Una plantilla es una UStruct definida en C++ que puede configurar y reconstruir procedimentalmente un grafo de MetaSound, su interfaz y sus entradas cada vez que un diseñador cambia una de sus propiedades expuestas. 

  • Las plantillas pueden limitar lo que ven los diseñadores a solo las propiedades que el autor de la plantilla eligió exponer; el grafo subyacente, la lista de miembros, las opciones de página y más se pueden ocultar opcionalmente por completo.

  • El programador define un pequeño conjunto de parámetros que quiere que los diseñadores controlen —una lista de sonidos, un rango de tono, un punto de corte de filtro— y el código de la plantilla se encarga de configurar las opciones dadas en un grafo de MetaSound válido.

• Desde el editor de MetaSound, los diseñadores seleccionan una plantilla del nuevo desplegable de la barra de herramientas de plantillas y editan sus propiedades en el panel Detalles de MetaSound.

  • También se admite la conversión de un MetaSound con plantilla de nuevo a uno estándar (conservando el último estado del grafo generado).

  • Una plantilla también puede incluir una pestaña de widget UMG totalmente personalizada basada en el marco MVVM de Unreal Engine, que proporciona una interfaz diseñada específicamente —controles deslizantes, vistas previas, editores de matrices— en lugar de los paneles por defecto de MetaSound o junto a ellos.

• Se incluye una plantilla de aleatorizador con UE 5.8 como implementación de referencia. Elige aleatoriamente de una lista de ondas de sonido especificada por el diseñador, aplica un desfase de tono dentro de un rango de semitonos configurable y es compatible con los modos de reproducción de una toma y en bucle. Está oculto por defecto en UE 5.8, pero sirve como ejemplo de código funcional para los autores de plantillas.

Formato y Channel Agnostic Types (CAT) (experimental)

• Integración completa de la canalización: la salida CAT se conecta ahora a través de MetaSoundSource, lo que significa que un grafo de MetaSound puede producir una señal CAT y enviarla directamente al motor de sonido. El formato del canal se puede determinar automáticamente observando las ondas de sonido establecidas en las entradas de MetaSoundSource.

• Formatos de sonido definidos por datos: las configuraciones de canales personalizados ahora se pueden declarar como formatos de sonido de primera clase y usarse directamente dentro de los grafos. Esto permite a los equipos definir y trabajar con configuraciones de altavoces no estándar o propias sin bifurcar el código del motor.

• Ambisónicos y transcodificación: los ambisónicos de primer orden son ahora un formato CAT integrado. La transcodificación entre formatos discretos y ambisónicos se gestiona automáticamente en los límites del grafo, por lo que los procesos de trabajo de sonido espacial ya no requieren nodos de conversión manual.

Nuevos nodos para experimentar

• Wave Player 2.0: un reproductor de ondas de nueva generación reimplementado sobre la base CAT que utiliza un contenedor de recursos de sonido experimental.

• CAT Mixer: un mezclado dedicado para combinar señales CAT multicanal dentro de un nodo.

• Grain Player: un nodo de reproducción de síntesis granular basado en la canalización CAT.

• Multiply: el nodo Multiply obtiene nuevas variantes compatibles con CAT:

  • CAT × float

  • CAT × CAT

  Las señales multicanal ahora se pueden escalar y modular sin colapsar primero a mono, lo que permite una ganancia por canal, modulación en anillo y conformación de envolventes directamente en los buses multicanal.

• Filtro en escalera: hemos portado el filtro en escalera para procesar tanto señales CAT como AudioBuffer estándar. Se mantiene la ruta de filtro mono existente; la ruta CAT gestiona el audio multicanal con filtros independientes por canal. Esta conversión también sirve como implementación de referencia para portar nodos DSP de MetaSound adicionales a CAT.

Sonido en Sequencer

Los diseñadores de sonido que utilizan Sequencer para cinemáticas, secuencias de juego y renderizado suelen encontrarse con dificultades en relación con el control de mezcla de sonido, comportamientos por defecto que no cumplen las expectativas y problemas de calidad de sonido en los renderizados exportados. En UE 5.8, incluimos un conjunto significativo de mejoras en tres áreas.

Bus de control y pistas de mezcla de bus de control

• Dos nuevas pistas de Sequencer incorporan la modulación de sonido directamente en la cronología.

  • La pista de bus de control permite establecer fotogramas clave y animar a lo largo del tiempo cualquier bus de control de modulación de sonido (volumen, tono, corte de filtro o cualquier parámetro de modulación personalizado) dentro de una secuencia.

  • La pista de mezcla de bus de control permite activar y desactivar una mezcla de bus de control predefinida (un conjunto de valores de modulación aplicados conjuntamente) en puntos específicos de la secuencia, lo que permite estados de mezcla de sonido precisos y repetibles vinculados a eventos cinemáticos.

Mejoras en la reproducción y el comportamiento de las secciones

• Hemos redefinido el comportamiento de bucle de la sección Sonido para que se ajuste más al propósito típico de un diseñador de sonido; los usuarios definen si un sonido se reproducirá hasta el final en lugar de reutilizar los conceptos de KeepState o RestoreState cuando la sección termina, y Bucle ha pasado a llamarse Repetición para distinguir entre la sección en los límites de fotogramas de juego y el bucle de recursos en los límites de las muestras.

• Las secciones de sonido ya no se expanden automáticamente cuando se añaden fotogramas clave fuera de sus límites.

• La integración de MetaSound permite una reproducción más fiable de las fuentes de MetaSound.

• Se ha mejorado el sistema de evaluación de sonido para evitar paradas y reinicios innecesarios cuando el contexto del cabezal de reproducción salta, lo que se traduce en un retroceso y avance más fluidos y un comportamiento de pausa/reanudación mejorado.

Mejoras de sonido en Movie Render Queue

• MRQ ahora es compatible con la selección ampliada de submezclas para la exportación de sonido, lo que te da control directo sobre qué submezcla se graba en lugar de estar limitado a la salida por defecto.

• Hemos solucionado los chasquidos, las pausas y las repeticiones de sonido que se producían anteriormente en los límites de corte de cámara; el componente de audio ahora se pausa y se reanuda en los cortes en lugar de detenerse y reiniciarse, eliminando así las discontinuidades a nivel de muestra en la salida renderizada.

WASAPI

En Unreal Engine 5.8, cambiamos el backend de sonido por defecto en Windows de XAudio2 a WASAPI. El nuevo módulo AudioMixerWasapi ahora se selecciona automáticamente; XAudio2 sigue estando disponible como opción de reserva. El mismo backend también se utiliza en Xbox. No se requieren cambios por parte de los desarrolladores. Todo el contenido debería comportarse de la misma manera; solo ha cambiado la capa que se comunica con el sistema operativo.

Por qué hemos hecho este cambio:

• Para estar preparados para el futuro. La construcción se lleva a cabo sobre una API de Windows compatible y con mantenimiento activo en lugar de una heredada.

• Para tener menor latencia. El acceso directo a la API de nivel inferior proporciona al mezclador de sonido más control sobre la programación del búfer.

• Para una gestión de dispositivos más robusta. El backend de WASAPI ahora incluye compatibilidad completa con el intercambio de dispositivos: conectar o desconectar auriculares, cambiar el dispositivo por defecto de Windows o hacer que los controladores de sonido fuercen un cambio de dispositivo se gestiona de forma limpia por el motor.

• Para lograr mejoras de calidad y fiabilidad. A lo largo del ciclo 5.8, el equipo de sonido ha reforzado el backend con a una larga lista de casos extremos reales de cambio de dispositivo, negociación de formato y apagado descubiertos en producción. El resultado es una ruta de sonido de Windows más estable de fábrica.

Lo que debes saber:

• Esto es un módulo, no un complemento. WASAPI se incluye como el módulo AudioMixerWasapi dentro del motor. No hay nada que activar ni instalar.

• Se admite el cambio de dispositivo. La conexión/desconexión de los auriculares, los cambios en el dispositivo por defecto y los cambios en la frecuencia de muestreo son gestionados por el backend.

• Posibilidad de desactivación (vuelta a XAudio2). Si te encuentras con un problema específico del proyecto, puedes volver al backend anterior añadiendo lo siguiente a Config/Windows/WindowsEngine.ini en tu proyecto:

  Config

  [Audio]
  AudioMixerModuleName=AudioMixerXAudio2

  Copy full snippet(2 lines long)

  Recomendamos informar de cualquier problema que encuentres para que pueda solucionarse antes de que XAudio2 se elimine definitivamente.

Plataforma

Renderizador para móviles

Con Unreal Engine 5.8, mejoramos el renderizador para dispositivos móviles y ampliamos el acceso a características de renderizado de alta calidad en los dispositivos compatibles.

UE 5.8 ofrece:

• Renderizado diferido multipase como la ruta por defecto en todas las plataformas móviles (con renderizado directo todavía disponible como opción).

• Mayor uso de GBuffer y datos de profundidad.

• Compatibilidad con dispositivos móviles para SSAO, SSR, renderizado diferido, sombras de contacto y renderizado de agua de mayor calidad.

En UE 5.8 también introducimos el uso de sombreadores de media precisión (FP16) en materiales específicos y pases de sombreado globales, lo que mejora el rendimiento a la vez que mantiene la calidad visual.

Juntos, estos cambios aumentan la fidelidad visual y la escalabilidad en hardware móvil de gama alta, al tiempo que mantienen el rendimiento y dan a los equipos más margen para ajustar los niveles de calidad.

Compatibilidad con la plataforma Android

Con Unreal Engine 5.8, ofrecemos mejoras específicas para la plataforma Android centradas en la compatibilidad de entrada y la velocidad de iteración.

UE 5.8 ofrece:

• Compatibilidad mejorada de mapeo del controlador.

• Configuración automatizada más sencilla de áreas de trabajo de desarrolladores usando Turnkey.

Estos cambios mejoran la productividad de los desarrolladores y la solidez de la plataforma para los equipos que desarrollan y prueban proyectos de Android.

Plataforma de previsualización

En Unreal Engine 5.8, mejoramos la fidelidad visual de la función Plataforma de previsualización para que los gráficos que se muestran en el Editor se ajusten más al aspecto y al comportamiento del hardware de destino.

Los equipos pueden detectar problemas visuales antes y reducir el coste de cambiar de dispositivo para iterar.

Para obtener más información sobre esta función, consulta Using Preview Platform

Compatibilidad con teclado y ratón para iOS y iPadOS

En Unreal Engine 5.8, añadimos compatibilidad completa con teclado y ratón para iOS y iPadOS, lo que permite a los creadores y jugadores interactuar con los proyectos utilizando dispositivos de entrada de escritorio estándar. Esto acerca el comportamiento de entrada en iPad y iOS a la paridad con macOS, mejorando la usabilidad para escenarios de desarrollo, pruebas y jugabilidad donde se esperan teclado y ratón.

Ahora se puede interactuar con los proyectos que se ejecutan en iOS y iPadOS de una manera coherente y similar a la de un equipo de escritorio cuando proceda, lo que reduce la fricción específica de la plataforma cuando el destino son los ecosistemas de Apple.

Eventos de gestos para iOS y Android (experimental)

Con Unreal Engine 5.8, presentamos un sistema experimental de eventos de gestos que conecta con los reconocedores de gestos nativos de iOS y Android, y expone sus eventos directamente al motor. Las acciones de pellizcar, deslizar, rotar y desplazar se reconocen con la misma precisión, temporización y transiciones de estado de inicio, cambio y finalización que obtienen las apps nativas. Esto elimina el código de gestión táctil por plataforma y proporciona a los desarrolladores una forma coherente de gestionar las interacciones táctiles en dispositivos móviles.

Extensiones de aplicación de iOS

En Unreal Engine 5.8, añadimos compatibilidad de primera clase para las extensiones de app de iOS a través de un nuevo archivo de control .uappex . Los autores del proyecto ahora pueden declarar extensiones como el servicio de notificaciones o los recursos en segundo plano junto con su proyecto de UE, y UnrealBuildTool genera automáticamente el objetivo de extensión de app de Xcode correspondiente, sin necesidad de edición manual de Xcode de posgeneración.

Unreal Engine Remote

Unreal Engine Remote es una app complementaria que permite a los desarrolladores previsualizar y probar la entrada móvil sin compilarla ni implementarla en un dispositivo físico. La versión 5.8 amplía la app a Android (anteriormente solo para iOS) y cambia el backend de transmisión a Pixel Streaming 2, para que una sesión de reproducción desde UE5 o una sesión de vista previa móvil desde Unreal Editor para Fortnite pueda transmitirse a un dispositivo móvil, reflejando de este modo la experiencia de juego en el dispositivo e informando de las entradas táctiles y gestuales en tiempo real.

Esto significa que los equipos pueden:

• Validar el comportamiento de entrada móvil directamente desde una sesión de vista previa.

• Iterar en los controles táctiles sin una compilación completa del dispositivo.

• Probar tanto los procesos de trabajo de UE5 como los de UEFN usando la misma app, tanto en iOS como en Android.

UE Remote acorta el bucle de desarrollo móvil, lo que proporciona a los desarrolladores una impresión rápida y precisa de cómo se siente la entrada en el hardware móvil sin el coste de repetidas implementaciones en el dispositivo.

Para obtener más información sobre esta función, consulta Using Unreal Engine Remote with Remote Session.

Compatibilidad de fotogramas de Steam (experimental)

Junto con Valve, hemos implementado compatibilidad experimental para su próxima plataforma de XR: https://store.steampowered.com/sale/steamframe

bPackageForOpenXRImmersive es un nuevo ajuste que, por defecto, está activado en la plantilla de RV.

Capas estéreo subyacentes

En UE 5.8, las capas estéreo de OpenXR ahora se pueden dibujar detrás de la escena principal. Esto abre la puerta a efectos de XR que antes requerían modificaciones del motor o complementos específicos del fabricante.

Antes de UE 5.8, la compatibilidad de OpenXR de Unreal Engine siempre dibujaba capas estéreo por encima de la capa de proyección (el mundo de UE renderizado), y las capas fijadas a la cara siempre se situaban por encima de las fijadas al mundo. Este orden fijo impedía la disponibilidad de capas subyacentes de serie —capas que aparecen detrás del entorno—, aunque la propia especificación de OpenXR solo acepta una lista ordenada de capas sin ninguna regla de ese tipo.

Este cambio sustituye el orden fijo por uno basado en la prioridad de las capas, coincidiendo con el funcionamiento de OpenXR. Añade dos nuevos ajustes:

• xr.OpenXRProjectionLayerPriority (por defecto = 0). La prioridad de la capa de proyección. Cualquier capa estéreo con una prioridad menor se dibuja detrás de ella; cualquier cosa con una prioridad mayor se dibuja delante, como antes.

• xr.OpenXRSortFaceLockedLayersAboveOtherLayers (desactivado por defecto): cuando está activado, las capas bloqueadas en la cara siempre se dibujan por encima de todo lo demás, independientemente de la prioridad. Esto coincide con el comportamiento anterior.

Para restaurar el orden anterior a UE 5.8, establece xr.OpenXRSortFaceLockedLayersAboveOtherLayers=1 y establece xr.OpenXRProjectionLayerPriority en un valor inferior a la prioridad de todas las capas estéreo de tu proyecto (por ejemplo, -2147483648, el entero mínimo de 32 bits). Los proyectos existentes siguen funcionando sin cambios.

Lista de cambios de GitHub para obtener más detalles (requiere iniciar sesión con una cuenta): https://github.com/EpicGames/UnrealEngine/commit/83641b6ac8b243d9858f54bafe1937f0accb4b6f

Para obtener más información sobre esta función, consulta OpenXR Stereo Layers.

Complemento PICO Controller OpenXR

El complemento PICO Controller añade soporte para los perfiles de interacción OpenXR de PICO XR_BD_controller_interaction y XR_BD_ultra_controller_interaction.

El complemento está habilitado por defecto en la plantilla de RV y las vinculaciones del controlador PICO se han configurado para los contextos de mapeo de entrada.

Shader Model 6 para iOS (experimental)

En Unreal Engine 5.8, añadimos compatibilidad experimental con Shader Model 6 (SM6) en iOS, integrando la biblioteca Metal Shader Converter de Apple para desbloquear funciones avanzadas de la GPU en ordenadores con chip de Apple.

UE 5.8 ofrece:

• Una variante de plataforma de sombreador SM6 de iOS dedicada junto con las rutas de Metal existentes

• Valores intrínsecos de Wave (operaciones de grupo SIMD) para algoritmos de cálculo de la GPU más eficientes

• Tipos de sombreador nativos de 16 bits (FP16) para mejorar el rendimiento de ALU en ordenadores con chip de Apple

Compatibilidad con ordenadores con chip de Apple A15 y posteriores. Se distribuye como experimental, con las trayectorias de renderizado de Metal existentes conservadas para una mayor cobertura de dispositivos. La validación de las funciones de renderizado con SM6, como las técnicas diferidas mejoradas y las rutas de cálculo de mayor calidad, está en curso y se incluirá en futuras versiones.

Canalización de contenidos

Rediseño de la IU: interfaz de usuario del diálogo de importación de Interchange

El marco de Interchange es altamente personalizable y, por consiguiente, los cuadros de diálogo para configurar Interchange e importar datos resultan abrumadores por la cantidad de opciones.

El objetivo de las próximas versiones es simplificar la IU. En UE 5.8, hemos reagrupado y renombrado todas las opciones relacionadas con la conversión de tipos de recursos para mayor claridad, mientras que las opciones de importación de materiales tienen un control más claro sobre la creación de materiales frente al uso de materiales existentes. 

Para obtener más información sobre esta función, consulta Marco de Interchange.

Rendimiento de importación de FBX

Aunque el uso de glTF y USD se intensifica, FBX sigue siendo el formato de datos principal para importar modelos 3D en Unreal Engine. Por eso, hemos introducido una biblioteca alternativa para mejorar la experiencia de usuario con este formato.

En UE 5.8, hemos llevado a cabo trabajos de estabilización para dar soporte a la biblioteca uFBX (experimental); esto reduce notablemente los tiempos de importación, especialmente en archivos .fbx pesados con mallas grandes. Los usuarios con CPU multinúcleo también notarán una mejora en archivos con un gran número de mallas.

En línea con USD, Unreal Engine ahora conservará la visibilidad de los nodos desde archivos .fbx al importarlos al nivel y lo aplica a la propiedad «oculto en el juego».

Pregeneración de recursos USD

Las escenas USD a menudo se componen de forma recursiva a partir de varios archivos USD referenciados. El proceso de trabajo actual de importación de USD con Interchange procesa estas composiciones de forma aislada, lo que genera importaciones aplanadas y una duplicación innecesaria de los datos de los recursos.

El nuevo marco USD Pregen introduce un sistema robusto para descubrir, seguir y mantener las relaciones entre los recursos USD referenciados y sus correspondientes representaciones en Unreal Engine.

Esta función es experimental en UE 5.8. Los principales beneficios son:

• Menos duplicación de recursos

• Procesamiento que tiene en cuenta la composición y los recursos

• Procesamiento granular

• Marco configurable

Importación de USD con Interchange

USD es un formato de archivo de descripción de escenas muy versátil cuya adopción está creciendo en la industria 3D.

Hemos añadido USD a la lista de formatos de archivo compatibles con el marco de Interchange en UE 5.5. Los creadores de contenido se benefician de un mayor control sobre el proceso de importación y ahora pueden añadir pasos de procesamiento personalizados para la importación de recursos de archivos USD, de forma similar a las capacidades de Interchange ya disponibles con otros formatos, como FBX.

En UE 5.8, la compatibilidad con USD a través de Interchange se considera lista para producción para la importación de recursos y experimental para la importación de niveles. Hemos añadido compatibilidad con:

• Ordenación de controladores de esquemas; la lista ordenada de controladores de esquemas utilizada al cargar un archivo USD está expuesta y es editable.

• Soporte para el trasladador de esquemas personalizados; el trasladador de USD se puede ampliar en el código para admitir esquemas personalizados.

• Un mecanismo para añadir un nuevo contexto de renderizado.

• Un esquema de ajustes de compilación de Nanite.

• Todos los atributos de Groom.

• Contracción (paridad con la importación de USD heredada).

• Chaos Cloth.

Editor

Sistema de gizmos del editor

Con Unreal Engine 5.8, presentamos un nuevo sistema de gizmos del editor diseñado para ofrecer una experiencia de interacción más coherente y flexible en todo el editor. Construido sobre el marco de herramientas interactivas, el nuevo sistema consolida varias implementaciones de gizmos heredados en un único marco utilizado en visores y herramientas. Esta unificación mejora la fiabilidad, la coherencia de la interacción y la extensibilidad para los desarrolladores que crean herramientas dentro del editor.

Los gizmos rediseñados también incluyen una serie de mejoras visuales y de usabilidad inspiradas en procesos de trabajo familiares para artistas y diseñadores de niveles de herramientas como Maya y Blender. Con objetivos de impacto mejorados, comentarios visuales más claros, preajustes de interacción personalizables y controles de precisión mejorados, el nuevo sistema proporciona un proceso de trabajo más rápido y predecible para manipular actores y recursos.

Para obtener más información sobre esta función, consulta Cómo transformar actores.

Mejoras visuales y de interacción

• Diseño de gizmo mejorado: perfil visual más delgado con objetivos de impacto mejorados para una selección e interacción más precisas.

• Comentarios mejorados al pasar el cursor y al interactuar: resaltado claro al pasar el cursor o interactuar con ejes y planos.

• Controladores en plano reposicionados: los ejes de movimiento en plano se sitúan más lejos del centro, lo que mejora la accesibilidad y reduce las selecciones accidentales.

• Controlador de movimiento en el espacio de la pantalla ampliado: cuadrado de movimiento central más grande para facilitar las traslaciones en pantalla.

• Mejoras en la visibilidad de los ejes: los ejes se ocultan temporalmente durante la interacción para mejorar la claridad visual.

• Comportamiento de escalado mejorado: los gizmos ahora funcionan de forma más fiable desde todos los ángulos de visión, lo que permite interacciones de escalado más predecibles.

Precisión y respuesta de movimiento

• Superposiciones numéricas de delta: las superposiciones en tiempo real muestran los deltas de movimiento, rotación o escala durante la interacción.

• Indicadores de líneas de delta: las líneas visuales indican cuánto se ha trasladado un objeto desde su posición original.

• Línea de delta de rotación: las interacciones de rotación muestran una línea de delta visual similar a la de Blender, lo que mejora la precisión al rotar desde mayores distancias.

Mejoras en el acoplamiento y la interacción

• Indicador de estado de acoplamiento: el icono central del gizmo ahora indica visualmente si el acoplamiento está habilitado.

• Controles de acoplamiento temporales: activa/desactiva rápidamente el acoplamiento de posición, rotación, escala o superficie mientras mantienes pulsada una tecla modificadora.

• Interacción con el límite del visor: sigue manipulando actores incluso cuando el cursor se mueve fuera de los límites del visor.

Preajustes de personalización y proceso de trabajo

• Preajustes de interacción: elige entre varios estilos de interacción:

  • Interacción por defecto de Unreal Engine

  • Interacción clásica de Unreal Engine

  • Interacción de estilo Maya

• Comportamiento personalizable del gizmo: mayor flexibilidad para que los equipos configuren las interacciones en función de su proceso de trabajo preferido.

Controles de precisión

• Modo de precisión: ralentiza temporalmente las transformaciones para realizar ajustes precisos.

• Modo de desplazamiento: ajusta incrementalmente la traslación, la rotación o la escala para ediciones controladas.

Mejoras en la vista previa de la escena

Con Unreal Engine 5.8, ampliamos el sistema de vista previa de la escena con nuevas mejoras de personalización y proceso de trabajo para los editores de recursos. Estas actualizaciones proporcionan a los usuarios un mayor control sobre cómo se presentan los recursos durante la vista previa, lo que facilita la evaluación de materiales, mallas y condiciones de iluminación directamente dentro del editor.

Mejoras de personalización

• Soporte para malla de suelo personalizada: configura una malla de suelo personalizada en las escenas de vista previa para que se adapte mejor al entorno donde se utilizarán los recursos.

• Material de suelo personalizado: aplica materiales personalizados al suelo de vista previa para mejorar el contexto al revisar los recursos.

Mejoras en el proceso de trabajo

• Mejoras en el diseño: la gestión de perfiles se ha trasladado a la parte superior de la pestaña para facilitar el acceso.

• Rotación de perfiles de vista previa: cambia rápidamente entre los perfiles de escena de vista previa avanzada usando un atajo de teclado, lo que permite a los usuarios cambiar rápidamente entre configuraciones de iluminación y entorno al evaluar los recursos.

Mejoras en el editor de vista previa de materiales

Con Unreal Engine 5.8, introducimos varias mejoras en el editor de vista previa de materiales para admitir un desarrollo de aspecto más rápido y procesos de trabajo de vista previa más flexibles. Estas actualizaciones facilitan la evaluación de materiales utilizando mallas de vista previa conocidas y la prueba rápida de recursos directamente dentro del entorno de vista previa.

Mejoras de vista previa

• Malla de vista previa de bola del sombreador: ahora hay disponible una bola de sombreador como opción de malla de vista previa nativa, lo que proporciona una superficie familiar para evaluar los materiales y la respuesta de la iluminación.

Mejoras en el proceso de trabajo

• Soporte para arrastrar y soltar recursos: ahora puedes arrastrar y soltar recursos directamente desde el explorador de contenido en la ventana de vista previa, lo que permite probar mallas y recursos más rápidamente.

• Espacio de material en malla personalizada: ahora el material se puede aplicar a espacios específicos cuando se ha seleccionado una malla de vista previa personalizada.

Gestor de atajos de teclado

Con Unreal Engine 5.8, incluimos una experiencia renovada del gestor de atajos de teclado, lo que hace que sea más rápido y fácil descubrir, gestionar y personalizar las combinaciones de teclas del editor. La interfaz actualizada ofrece capacidades de búsqueda mejoradas, una presentación más clara de los comandos y herramientas optimizadas para gestionar las configuraciones de atajos de teclado.

Con una IU modernizada en línea con el estilo actual del editor de Unreal Engine y herramientas de búsqueda mejoradas para localizar rápidamente comandos asignados o sin asignar, el gestor de atajos de teclado actualizado ayuda a los desarrolladores y artistas a adaptar sus procesos de trabajo de forma más eficiente.

Mejoras en la interfaz y la usabilidad

• Actualización visual de la IU: interfaz actualizada con un estilo que se adapta al moderno tema oscuro de Unreal Editor.

• Ventana dedicada: los atajos de teclado ahora cuentan con una ventana dedicada con un diseño más compacto.

• Diseño más limpio: se ha reducido el texto de las burbujas informativas en línea para mejorar la legibilidad y hacer más claras las descripciones de los comandos.

• Búsqueda de atajos de teclado centrada: la opción de búsqueda ahora se limita específicamente a los atajos de teclado, lo que facilita la búsqueda de comandos por acción o nombre de comando sin resultados no relacionados.

Búsqueda y descubrimiento mejorados

• Búsqueda de teclas de atajos de teclado: encuentra rápidamente comandos asignados a una combinación de teclas específica (por ejemplo, si buscas Ctrl + S, se muestran todos los comandos vinculados a ese atajo).

• Botón de búsqueda de asignaciones de teclas: una opción dedicada a buscar directamente pulsando una combinación de teclas para mostrar todos los comandos asignados.

• Sintaxis de búsqueda avanzada: filtra los resultados para localizar estados específicos, como comandos no vinculados, lo que ayuda a identificar oportunidades para personalizar los procesos de trabajo.

Configuración y proceso de trabajo

• Importación y exportación mejoradas: herramientas optimizadas para compartir y transferir configuraciones de atajos de teclado entre máquinas o equipos.

• Gestión más rápida de las combinaciones de teclas: mayor facilidad para encontrar comandos y asignaciones para ayudar a los usuarios a personalizar rápidamente su experiencia en el editor.

Mejoras en las preferencias del editor

Con Unreal Engine 5.8, introducimos actualizaciones en el sistema de preferencias del editor para mejorar la coherencia, la facilidad de descubrimiento y la facilidad de uso. Las preferencias del editor, la configuración del proyecto y los ajustes de los complementos ahora comparten un estilo visual y una disposición más unificados, lo que facilita la navegación por los ajustes en todo el editor.

Las mejoras adicionales en la búsqueda, los atajos de teclado y la función de restablecimiento te permiten encontrar y gestionar más rápidamente los ajustes que necesitas.

Mejoras en la interfaz y la navegación

• Estilo de ajustes unificado: las preferencias del editor, la configuración del proyecto y los ajustes de los complementos ahora comparten un diseño y una disposición visuales coherentes.

• Vista por defecto de todos los ajustes: los ajustes se abren ahora con la categoría Todos los ajustes seleccionada por defecto para facilitar su descubrimiento.

• Búsqueda por categoría: los usuarios pueden buscar dentro de una categoría específica seleccionándola, lo que facilita la limitación de los resultados.

Mejoras en la búsqueda y el descubrimiento

• Visibilidad de variables de consola en la búsqueda: identifica fácilmente cuándo una preferencia está controlada o influenciada por una variable de consola (CVar).

Mejoras en el proceso de trabajo

• Acceso directo de teclado: abre rápidamente las preferencias del editor, la configuración del proyecto y los atajos de teclado usando teclas de acceso rápido dedicadas.

• Restablecimiento de los valores por defecto: la mayoría de los ajustes se pueden restablecer ahora fácilmente a sus valores por defecto, lo que simplifica la experimentación y la recuperación de los cambios de configuración.

Mejoras en el visor ortogonal

Con Unreal Engine 5.8, introducimos varias mejoras en los visores ortogonales con el objetivo de mejorar la claridad y la usabilidad cuando se trabaja en las vistas superior, lateral y frontal. Estas actualizaciones reducen el ruido visual y garantizan que las herramientas de edición importantes permanezcan claramente visibles durante la interacción.

Para obtener más información sobre esta función, consulta Cámara ortogonal.

Mejoras en la claridad visual

• Mejora del renderizado de la vista iluminada: se reducen las interferencias de la niebla atmosférica en las vistas ortogonales, lo que se traduce en resultados de iluminación más claros y predecibles.

• Densidad de cuadrícula reducida: la cuadrícula ortogonal se ha escalado para reducir el ruido visual y el desorden, lo que mejora la legibilidad de la escena.

Mejoras en la interacción

• Los gizmos se renderizan encima: los gizmos de transformación ahora se renderizan por encima de los objetos seleccionados, garantizando que permanezcan visibles y fáciles de usar durante la edición.

Menú contextual del explorador de contenido

En Unreal Engine 5.8, incluimos una simplificación del menú contextual del explorador de contenido con el objetivo de reducir la fricción en el proceso de trabajo de creación de recursos. Este esfuerzo se centra en reducir la altura del menú, organizar los tipos de recursos de forma más lógica y hacer que los recursos más utilizados sean más fáciles de encontrar, lo que se traduce en una experiencia de menú contextual más limpia y optimizada.

Mejoras en la organización de los menús

• Menos categorías principales: se ha reducido el número de categorías en el menú contextual para minimizar la altura y facilitar la exploración del menú.

• Nuevas subcategorías de sonido y animación: se han añadido subcategorías específicas para sonido y animación para organizar mejor los tipos de recursos y evitar listas demasiado largas.

• Nueva sección de datos: se ha introducido una categoría de datos para facilitar la identificación y el acceso a los recursos orientados a datos.

Mejoras en el descubrimiento de recursos

• Instancias de material en la sección común: se han añadido instancias de material a la sección común para poder acceder más rápido a uno de los tipos de recursos más utilizados.

Favoritos del panel Detalles

En Unreal Engine 5.8, ampliamos el sistema de favoritos del panel Detalles para que recorrer y hacer un seguimiento de las propiedades importantes sea más rápido y sencillo. Estas actualizaciones ayudan a los usuarios a localizar rápidamente los ajustes más utilizados y a identificar las propiedades modificadas dentro de actores y recursos complejos.

Mejoras en los favoritos

• Posibilidad de marcar categorías enteras como favoritas: los usuarios ahora pueden marcar como favoritas categorías de propiedades enteras, lo que facilita el acceso a grupos de ajustes de uso común sin tener que marcar como favoritas propiedades individuales.

Mejoras en el feedback visual

• Barra de filtro de la sección Categoría: la barra de la sección ahora puede filtrar opcionalmente el panel Detalles para mostrar las categorías favoritas o las propiedades modificadas.  Puedes habilitarlo en el menú desplegable de ajustes del panel Detalles.

Ventajas del proceso de trabajo

• Navegación más rápida por las propiedades: estas mejoras facilitan la localización de los ajustes utilizados con frecuencia y la identificación rápida de las propiedades que se han modificado en el panel Detalles.

Servidor de MCP (experimental)

Con Unreal Engine 5.8, presentamos un nuevo complemento experimental MCP (Model Context Protocol) para Unreal Editor. Este complemento permite que los sistemas de IA basados en agentes se conecten a Unreal Editor. Permite a estos sistemas comprender el motor y el proyecto, además de ayudar a los usuarios a construir recursos o sistemas.

Para obtener más información sobre esta función, consulta Unreal MCP.

Entornos de pruebas

Los entornos de pruebas proporcionan un espacio de trabajo aislado donde puedes experimentar sin afectar al proyecto principal. Abre un entorno de pruebas, crea y edita libremente, y guarda solo lo que quieras conservar

Ya no necesitas crear una rama secundaria, copiar recursos a una carpeta de trabajo en curso o preocuparte por contaminar tu control de versiones solo porque quieras probar algo.

• Crea un entorno de pruebas y trabaja dentro de él sin afectar al contenido del proyecto. Navega, cambia y consulta los cambios en los entornos de pruebas desde un navegador específico.

• Conserva solo los cambios que quieras mantener en tu proyecto

• Exporta un entorno de pruebas para compartirlo con un compañero de equipo o importa uno para continuar donde lo dejaron

Canalización de renderizado de producción

Movie Render Graph (listo para producción)

Movie Render Graph entra en el estado Listo para producción en UE 5.8.

Las configuraciones basadas en grafos ahora son compatibles con todas las características principales que se encuentran en los preajustes heredados. Los usuarios pueden seguir utilizando configuraciones basadas en preajustes, pero en el futuro las nuevas características solo se basarán en grafos.

Para obtener más información sobre cómo usar esta función, consulta Grafo de Movie Render. 

Modificador de luz

Con la vista puesta en los procesos de trabajo de posproducción, el modificador de iluminación permite a los artistas establecer y anular valores de propiedades para actores de iluminación por capa de renderizado en Movie Render Graph. Utilizando el mismo nivel y secuencia de nivel, los artistas pueden aislar luces individuales o grupos de luces y renderizar tomas con diferentes valores de intensidad, color o cualquier propiedad personalizada en cualquier tipo de luz.

Una nueva condición de tipo de actor de luz en el nodo Collection facilita y hace más cómoda la agrupación de luces para modificarlas por capa de renderizado. Las propiedades también se pueden convertir en variables de grafo y exponerse como anulaciones tanto en las ventanas de Renderizado rápido como en las de Movie Render Queue.

Profundidad de campo por acumulación

Las consideraciones de rendimiento en tiempo real para la renderización de la profundidad del campo pueden limitar la calidad visual en tomas que la enfatizan en su diseño. Para lograr una profundidad del campo más «cinematográfica», los artistas deben pasar a Path Tracer, que tiene un mayor coste en tiempo de renderizado, y hacerlo para todas las tomas para mantener la coherencia, incluso las que no dependen de la profundidad del campo. Lo idóneo sería que hubiera una opción para tener lo mejor de ambos mundos en términos de rendimiento y calidad.

Profundidad del campo por acumulación es una nueva función que renderiza la profundidad de campo acumulando renderizados diferidos desde múltiples puntos de vista de apertura usando Movie Render Graph. Esto reduce en gran medida los artefactos debidos a la falta de paralaje al tiempo que se conserva el desarrollo del aspecto de renderizado diferido. Los artistas pueden usar esta función cuando no obtienen los resultados visuales deseados con la profundidad de campo por defecto y evitar el coste en tomas que no la necesitan. 

Renderizado de nDisplay en el grafo

Aunque las implementaciones de nDisplay pueden ejecutarse en directo y en tiempo real (y a menudo lo hacen), la capacidad de renderizar un clúster usando Movie Render Queue puede ser muy útil para casos de uso como la reproducción prerrenderizada y la revisión de contenido en curso. En la versión UE 5.8, integramos nDisplay con Movie Render Graph para ofrecer una mejor compatibilidad con configuraciones de renderizado escalables. El conjunto de características de UE 5.8 incluye:

• Compatibilidad con colecciones, modificadores y capas de renderizado.

• Compatibilidad tanto con el renderizador diferido como con Path Tracer.

• Control sobre el DCRA en Sequencer o usando una anulación en la configuración del grafo.

• Tokens de nomenclatura de archivos integrados para conceptos de nDisplay como DCRA, nodo, visor, etc.

• Compatibilidad con renderizado estéreo.

El soporte para cámaras ICVFX se incluirá en una futura versión.

Para obtener más información sobre el uso de esta función, consulta nDisplay Overview.

Nueva ventana Cola: configuración básica

Con Unreal Engine 5.8, presentamos una nueva ventana Cola optimizada con una configuración básica que ofrece propiedades comunes como el nombre, la resolución y la ubicación para renderizados de una sola capa directamente en el panel. Los artistas pueden elegir entre el renderizador diferido y Path Tracer, y cambiar el tipo de salida sin tener que abrir otra ventana o guardar un recurso.

Los valores por defecto se pueden personalizar y guardar para que la cola siempre se abra con los ajustes correctos y deseados. El estado actual de la configuración básica también se puede guardar como una configuración del grafo para usarla como punto de partida en configuraciones de renderizado más complejas.

Producción virtual

Administrador de capturas de movimiento (beta)

Para Unreal Engine 5.8, hemos mejorado el administrador de captura de movimiento de las siguientes maneras:

• Cámaras automáticas: genera y controla cámaras procedimentales que siguen y encuadran la acción dinámicamente.

• Extensibilidad para el usuario: los usuarios ahora pueden crear sus propias IU de proceso de trabajo personalizadas.

• Vista previa de animación facial dedicada: comprueba rápidamente la animación facial sin necesidad de mover la cámara del visor.

• Ajuste de reposicionamiento mejorado.

• Compatibilidad con la ingesta de vídeo del administrador de capturas: el administrador de capturas de movimiento ahora puede canalizar tus vídeos de animación facial con el resto de los datos de la sesión de captura de rendimiento.

• Configurabilidad de la grabación de sonido: paridad con Take Recorder para definir la selección de dispositivo de sonido y canal por pista de grabación.

• Integración de dispositivos Live Link Hub: controla la grabación de Hub desde el administrador de capturas de movimiento.

Composure (beta)

El nuevo Composure entra en estado beta en la versión UE 5.8. Se han introducido numerosas mejoras tanto para escenarios en directo como de posvisualización, entre ellas:

• Compatibilidad completa con Sequencer (incluidos los generables) para actores compuestos y actores de cámara referenciados.

• Reflejos planos y capas de sombras de una sola luz ligeros como opciones de rendimiento más rápidas.

• Las pasadas ahora se pueden configurar en todas y cada una de las capas (más allá de las capas de placa) y hay varias pasadas nuevas y mejoradas:

  • Desenfoque

  • Dilatación

  • Enmascarando

  • Material de posprocesamiento

  • Transformación

  • Traslucidez

• Mejoras en la experiencia de usuario del panel Composure:

  • Sincroniza la selección de actores.

  • Gestionar materiales de malla compuesta.

  • Asigna componentes específicos como mallas compuestas o contenido captador de sombras/reflejos.

  • Inicia la captura de medios directamente desde Composure.

  • Opción práctica para crear un actor de SkySphere con la placa actual.

• Etalonaje: integración de pasadas con el panel Etalonaje del editor.

Selector de claves de Composure

Una tonalidad de alta calidad es una característica fundamental de cualquier conjunto de herramientas de composición y, en la compilación de la versión UE 5.8, ampliamos las opciones de Composure en varias áreas clave:

• Obtén una vista previa de la textura multimedia al elegir un color de clave sin tener que cambiar de contexto dentro del editor.

• Adquiere una textura de placa limpia de una transmisión en directo con un solo clic en el panel Composure, guárdala cómodamente como un recurso y configúrala automáticamente en el actor compuesto.

• Utiliza una pasada del selector de claves de Luma en lugar de (o además de) la pasada de selector de claves de color.

• Usa Ultimatte con Composure a través de una pasada personalizada que configura la canalización de renderizado para garantizar la precisión cromática.

• Utiliza la nueva pasada de dilatación para ajustar los bordes.

Cómo visualizar el canal alfa en el visor

Inspecciona los canales rojo, verde, azul o alfa directamente en el editor con una nueva opción de visualización del visor. El menú Canales proporciona opciones adicionales para anclarlo al menú del visor para un acceso más rápido y visualizar el canal alfa como un tablero.

Exposición automática de nDisplay

Los proyectos de Unreal Engine suelen utilizar la exposición automática, que toma muestras del búfer de escena y calcula el histograma de brillo promedio para el ajuste dinámico de EV. Hasta ahora, nDisplay requería EV manual para garantizar la continuidad en los visores. En UE 5.8, introducimos compatibilidad con la exposición automática en nDisplay.

La medición puede utilizar todo el DCRA de nDisplay o nodos o visores específicos que se apliquen al resto del clúster. También puedes excluir objetos de la exposición automática.

Rivermax en Linux

El complemento Nvidia Rivermax en la versión UE 5.8 ahora es compatible con el sistema operativo Linux, además de Windows, con funcionalidad validada para nDisplay para ICVFX.

Live Link Hub - Marco de dispositivos

Para los equipos que necesiten utilizar varios dispositivos de grabación durante una sesión de captura de movimiento, Live Link Hub ofrece ahora un marco de dispositivos para controlar los dispositivos a través de IP en tu estudio de captura de movimiento. Ahora puedes supervisar todos tus datos de Live Link, los clientes del editor UE y controlar los dispositivos de grabación desde un solo lugar.

Live Link Hub incluye una amplia selección de dispositivos:

• Live Link Face para iOS y Android

• Plataformas de vídeo AJA

• Grabadora de audio de dispositivos de sonido

• Grabadora de pantalla OBS

Los proveedores de hardware y software de captura de movimiento de terceros, como Optitrack y Vicon, enviarán actualizaciones a sus complementos para la versión UE 5.8.

Tus clientes de Unreal Engine, que ejecutan el administrador de capturas de movimiento o Take Recorder, pueden enviar el nombre de claqueta y el número de toma a Live Link Hub y a todos los dispositivos conectados, así como controlar el inicio y la detención de la grabación. Introduce la claqueta y la toma requeridas en una ubicación y mantenlas coherentes en todo tu estudio de captura de movimiento.

Live Link Hub - Control de código de tiempo y paso de tiempo

Usando el perfil de medios de Live Link Hub, los usuarios ahora pueden establecer de forma remota el código de tiempo y el paso de tiempo de todos los clientes de UE conectados, manteniendo la coherencia de los datos registrados en la configuración del escenario de captura de movimiento y en los proyectos.

• Se admiten los proveedores de código de tiempo de Live Link y del sistema.

• Se admiten el paso de tiempo personalizado de código de tiempo y el paso de tiempo personalizado de Live Link.

Live Link Hub - Monitorización de vídeo

Live Link Hub ahora utiliza el perfil de medios de UE para ver y controlar datos de vídeo para su uso en la resolución de animaciones y la monitorización de referencias. Usando una nueva fuente de medio RTSP, así como las fuentes de medios AJA, BlackMagic y NDI existentes, los usuarios pueden monitorizar varias fuentes de vídeo durante las sesiones de captura de movimiento, incluida la transmisión desde la app Live Link Face en Android y iOS.

La fuente Live Link de vídeo de MetaHuman ahora puede utilizar fuentes de vídeo del perfil de medios como datos de animación facial, lo que abre un amplio abanico de cámaras y dispositivos de captura para su uso en la captura facial.

Tokens de nomenclatura de utilidad del editor

Los usuarios ahora pueden crear tokens de nomenclatura de utilidad del editor, que tienen acceso a funcionalidad del editor anteriormente no disponible para los tokens de nomenclatura de tiempo de ejecución.

• Llama a las funciones de utilidad del editor directamente dentro de un blueprint de token de nomenclatura.

• Ejecuta nodos de Python al evaluar un token y recupera los valores de tu token de tu base de datos o procesos externos.

Editor de plantillas de cronograma integrado en esquemas CAT

Ahora puedes crear plantillas de cronocrama directamente desde el editor de esquemas. Los artistas de cinemáticas ya no necesitan crear manualmente la misma disposición de secuencias una y otra vez. Los esquemas se pueden referenciar como subsecuencias dentro de los cronogramas de esquemas futuros, lo que permite crear jerarquías anidadas de plantillas reutilizables para cámara, efectos, iluminación y mucho más.

• Diseña una plantilla de esquema una vez y reutilízala en cada ensamblaje.

• Crea la estructura de la plantilla visualmente en el editor de esquemas sin salir de las herramientas de montaje cinemático.

• Especifica las pistas, las carpetas, los generables y subsecuencias que deben incluirse en cada ensamblaje creado a partir del esquema.

• Anida los esquemas como subsecuencias para crear una jerarquía compleja en fragmentos manejables.

Cómo hacer referencia a generables durante la grabación de tomas y establecerlos como padres

Los actores ahora pueden mantener referencias a generables a través de registros de tomas. Los actores con padres en generables mantendrán su parentesco durante toda la grabación y se grabarán correctamente con pistas adjuntas en el resultado. Ya no necesitas depender únicamente de los poseíbles o crear herramientas personalizadas para reemplazar las referencias a los generables cuando se rompen al inicio de la grabación.

• Haz referencia a los generables de forma segura durante la configuración y la grabación.

• Vuelve a grabar el mismo actor para que sea generable sin sobrescribir.

• Usa el esquematizador del mundo para establecer un generable como padre y mantener esa relación de parentesco durante la grabación.

Explorador de acoplamiento y restricciones de VCam

La cámara virtual ahora tiene un explorador dedicado para el parentesco y las plataformas.

• Explora todos los actores y componentes que se pueden adjuntar desde la IU de VCam.

• Conecta y desconecta la cámara en un objetivo sin salir de VCam.

• Filtra por tipos de actores clave o solo por actores cercanos a ti.

Acoplamiento por eje de VCam

VCam ahora se adjunta a sus padres a través de restricciones de animación, lo que te permite elegir qué ejes heredar o ignorar para un control más preciso. Mejora la experiencia de usuario del panel Composure.

Multimedia

Vídeo con mapas MIP en tesela (experimental)

Con la incorporación de compatibilidad de teselas y mapas MIP a la reproducción EXR, hemos hecho posible la reproducción en alta resolución en configuraciones de pantalla complejas. En UE 5.8, para proporcionar una experiencia de reproducción más equilibrada a nuestros usuarios, hemos añadido TMV, un contenedor de vídeo para teselas y mapas MIP con compresión. Esto abordará la sobrecarga extrema del tamaño de archivo de los EXR y los requisitos de ancho de banda para la reproducción de vídeo de alto rendimiento.

Está dirigido a ICVFX, eventos en directo y a cualquiera que necesite un formato de vídeo robusto para motores de juego.

TMV ayuda a los usuarios a lograr lo siguiente:

• Reproducción de vídeo de primera clase en el motor (transmite desde el disco solo los píxeles necesarios en lugar de descodificar fotogramas de vídeo completos)

• Retroceso y avance fluidos (comparable con el rendimiento de retroceso y avance de Apple Pro Res)

• Alta calidad de imagen manteniendo al mismo tiempo una huella de almacenamiento razonable (algoritmos de compresión con y sin pérdida)

• Soporte para la codificación HDR de alta profundidad de bits

• Soporte de baja latencia para mostrar solo lo necesario en el campo de visión. Las teselas se pueden cargar y descargar en función de la tesela solicitada.

Transcodificador de vídeo (experimental)

Las herramientas profesionales de edición de vídeo suelen transcodificar los recursos de vídeo entrantes a un formato de vídeo optimizado común para mejorar las capacidades de edición y retroceso y avance. En UE 5.8, añadimos una herramienta experimental de transcodificación de vídeo que puede admitir la mayoría de los formatos de entrada disponibles del sector en nuestro nuevo contenedor de vídeo TMV (vídeo con mapas MIP en tesela).

Una vez transcodificado, el recurso de vídeo estará disponible para su reproducción en el motor como cualquier otro formato. La principal diferencia es que TMV está optimizado para la reproducción en el contexto de motores de juego y renderizado 3D.

Está dirigido a usuarios de cualquier sector que necesiten transcodificar vídeo a un contenedor EXR o TMV (con o sin teselas y mapas MIP).

En concreto, en esta versión añadimos lo siguiente:

• Gestión de trabajos (añadir, duplicar o eliminar trabajos)

• Puede ejecutar tareas como commandlet (CLI)

• Exportación de la configuración de la herramienta a formato JSON

• Vista previa del progreso de transcodificación en directo

• Compatibilidad tanto con secuencias de imágenes (incluido EXR) como con archivos de vídeo

• Personalización de teselas y mapas MIP

• Gestión del color y anulaciones

• Ajustes de calidad

Media Viewer (beta)

A menudo, los animadores necesitan alinear sus animaciones con material de referencia existente. En la versión 5.6, hemos añadido la posibilidad de acoplar medios (imágenes, texturas multimedia, archivos de vídeo, visores en tiempo real) junto al lugar donde se realiza el trabajo de animación.

Dos bancos AB en configuraciones horizontales o verticales ayudan a comparar dos conjuntos de recursos. Los controles de zoom y panorámica se pueden utilizar para alinear aún más el contenido. Los marcadores recuperan rápidamente la configuración de los recursos con atajos de teclado. En UE 5.8, el complemento Media Viewer se acerca a su fase Listo para producción e incluye las siguientes mejoras en el proceso de trabajo y la facilidad de uso:

• Proceso de trabajo mejorado para acceder a las texturas de medios de Sequencer.

• Volteo horizontal/vertical de la biblioteca de imágenes.

• Modo de filtrado ajustable por nivel de zoom con visualización de cuadrícula de píxeles.

• Compatibilidad con TMV (Vídeo con mapas MIP en tesela).

Para obtener más información sobre esta función, consulta Visor multimedia. 

Simulación y efectos visuales

Chaos Destruction

El sistema Chaos Destruction proporciona un potente conjunto de herramientas para lograr una destrucción de calidad cinematográfica en tiempo real, combinando una alta fidelidad visual con una sólida optimización del rendimiento. Las actualizaciones de UE 5.8 incluyen lo siguiente:

Editor

• Ahora hay disponible una plantilla de Dataflow predeterminada al crear un recurso.

• Los nuevos recursos ahora muestran un icono en sus miniaturas que indica que tienen un flujo de datos adjunto.

• Hemos añadido ajustes de renderizado para los tipos renderizables de colección de geometría.

Componente

• Hemos añadido la posibilidad de establecer la amortiguación lineal y angular por transformación.

• Hemos añadido nuevas funciones de Blueprint para consultar las transformaciones actuales:

  • GetCurrentTransforms

  • GetCurrentTransformsFromIndices

• Hemos corregido la indexación incorrecta en la interfaz de datos de destrucción de Niagara, que hacía que algunas partículas aparecieran en el origen.

• Hemos corregido el ajuste de la respuesta de colisión en un componente de colección de geometría.

• Hemos añadido compatibilidad con la opción de par giroscópico a las colecciones de geometría.

• Hemos corregido que las velocidades no se establecieran correctamente en las partículas GT al sincronizar desde el subproceso del juego.

• Hemos actualizado el movimiento del personaje para pasar correctamente el nombre del hueso a la función que obtiene la velocidad lineal.

• Hemos corregido que las trazas no siempre funcionaran en clústeres parciales al usar la acción de eliminar en rotura/reposo.

Campos

• Hemos corregido un posible bloqueo cuando un campo procesa un clúster parcial.

Para obtener más información sobre el uso de esta función, consulta Destrucción de Chaos.

Editor de flujo de datos de Chaos

Dataflow es el sistema basado en nodos de Unreal Engine para la generación procedimental de recursos basados en la física. Se utiliza ampliamente en procesos de trabajo para configuraciones de tela, destrucción, pelo, carne y MetaHuman. Las actualizaciones de UE 5.8 incluyen lo siguiente:

• Evaluación del grafo en tiempo de ejecución.

• IU y experiencia de usuario mejoradas (más herramientas interactivas, gizmos, etc.).

• Creación de malla esquelética.

  • Herramientas de geometría mejoradas (fusión).

  • Un kit de herramientas más completo para crear restricciones.

• Almacenamiento en caché en el grafo.

Chaos Visual Debugger

Chaos Visual Debugger (CVD) proporciona a los usuarios de Unreal Engine una forma de observar y depurar eficazmente sus simulaciones de física, ya sea directamente en Unreal Editor o desde una instancia independiente de CVD. Las actualizaciones de UE 5.8 incluyen lo siguiente:

• Un sistema de seguimiento de cámara.

• El panel de visualización de la geometría.

• Compatibilidad con selección múltiple.

• Una vista de complejidad trimalla.

Tecnología central de Chaos

Estamos añadiendo mejoras fundamentales al sistema de física Chaos de Unreal Engine para permitir procesos de trabajo de simulación más reactivos y escalables. Las actualizaciones de UE 5.8 incluyen lo siguiente:

• Generación de islas seguras para subprocesos mejorada.

• Más control sobre la sensibilidad de los objetos y el reposo de la isla.

• Mejor paralelización intraísla mediante separación espacial o de color.

• Una API de resolución protegida y un nuevo modelo de ejecución.

• Seguimos trabajando para eliminar el subproceso de física monolítico y pasar al grafo de trabajos.

• Un modelo de filtrado ampliado y preparado para el metaverso:

  • Canales de 64 bits.

  • Máscaras de canal frente a selección de canal único.

  • Filtros ampliados más allá de 64 canales.

• Creación de mallas esqueléticas en Dataflow

• Mejor escala y limitación dentro de los solucionadores de cuerpos rígidos y deformables.

  • Simulaciones de espacio local.

  • Anclaje de velocidad.

  • Eliminación de ImplicitObjectScaled para la escala por forma.

• Nodo de resolución de Chaos++ para usar en Dataflow, con el fin de probar una API inicial externa al solucionador del mundo.

Almacenamiento en caché de Chaos

El proyecto de marco de caché se centra en ampliar el sistema existente para almacenar y reproducir datos de simulación de forma eficiente en todas las funciones basadas en Chaos, como la ropa, los fluidos, la destrucción y la carne. Las actualizaciones de UE 5.8 incluyen lo siguiente:

• Caché por componente en Sequencer.

  • Es compatible tanto con el naking en el editor como con la reproducción en tiempo de ejecución.

• Uso del recurso de caché de Chaos como un metarrecurso que apunta a formatos optimizados más relevantes.

• Hemos añadido herramientas para el control de versiones, el recorte y la invalidación de la caché.

• Validación del proceso de trabajo de cinemática.

  • Pose de reposo de la tela en Sequencer.

Chaos Hair

Para Chaos Hair, las actualizaciones de UE 5.8 incluyen:

• Compatibilidad ampliada con atributos de pintura, pesos de la piel e intercambio de guías.

• Renderizado y simulación compatibles con Nanite.

• Generación de tarjeta a malla esquelética.

• Herramientas de edición de pelo (cortar/rizar).

• Prototipo de renderizado de mechones.

Chaos Flesh

Este proyecto se centra en unificar los solucionadores de Chaos para tela y carne en un único marco de simulación deformable. Las actualizaciones de UE 5.8 incluyen:

• Fusión de los solucionadores de tela y carne en un único núcleo deformable.

• Habilitación de interacciones procedimentales entre capas (piel, músculo, prenda).

• Rendimiento mejorado mediante la memoria compartida y la lógica de resolución.

• Nodos de Dataflow actualizados para usar el nuevo sistema de renderizado de Dataflow.

Chaos Cloth

Con UE 5.8, Chaos Cloth está listo para producción. Las actualizaciones incluyen:

• Permite actualizaciones no destructivas y edición interoperable con CLO/Marvelous Designer.

  • Importa restricciones USD y atributos de tela en Unreal Engine.

  • Conserva la estructura del panel, los muelles y los metadatos de simulación.

• Admite la reproducción y reedición de simulaciones en Dataflow.

• Habilitación de interacciones procedimentales entre capas (piel, músculo, prenda).

• Rendimiento mejorado mediante la memoria compartida y la lógica de resolución.

• Datos del Material Cloth Interactor para ayudar a gestionar los ajustes de grupos de propiedades desde blueprints.

• Hemos añadido fuerzas ficticias en simulaciones a escala de velocidad completa.

Vehículos modulares de Chaos

El sistema Vehículo modular permite a los usuarios construir vehículos en tiempo real utilizando componentes dinámicos de Scene Graph en lugar de depender de mallas esqueléticas fijas. Diseñado con físicas predictivas del cliente y acreditadas por el servidor, es compatible con una construcción flexible. Este sistema permite a los creadores fabricar vehículos tradicionales o poco convencionales utilizando piezas modulares dentro de Unreal Engine.

• Hemos añadido compatibilidad con la construcción de vehículos mediante una malla esquelética, lo que permite a los usuarios crear fácilmente vehículos sencillos con el mismo marco.

• Hemos añadido interacción bidireccional entre el vehículo y el suelo.

Para obtener más información sobre esta función, consulta Chaos Modular Vehicles.

Actualizaciones del SDK de la plataforma

• Windows

  • Versión recomendada de Visual Studio: 2026

  • Versión mínima de Visual Studio: 2022 v17.14 o posterior

  • Versión recomendada de MSVC: 14.50

  • Versión mínima de MSVC: 14.38

  • Versión predeterminada del SDK de Windows: 10.0.26100.0

  • Versión mínima del SDK de Windows: 10.0.22621.0

  • LLVM clang

    • Mínimo: 18.1.8

    • Recomendado: 20.1.8

  • Intel oneAPI

    • Versión mínima: 2026.0.0

    • Versión preferida: 2026.0.0

  • .NET 10.0 para VS 2026

  • Otras notas

    • Usa Visual Studio 2022 para el desarrollo de Nintendo y AGDE por debajo de la versión 26.1.102.

• Versión del IDE con la que compila la granja de compilación

  • Conjunto de herramientas de Visual Studio 2022 17.14 14.44.35207 y del SDK de Windows 10 (10.0.22621.0)

  • Xcode 16.1

• GDK

  • GDK: abril de 2026

  • Versión de recuperación más reciente

  • IDE compatible: Visual Studio 2022 y 2026

  • Versión mínima del SDK de Windows: 10.0.22621.0

  • Otras notas

    • Usa Visual Studio 2022 para GDK anteriores a abril de 2026.

• Linux

  • Desarrollo nativo de Linux

  • SO recomendado: Ubuntu 22.04, Rocky Linux 8 o posteriores, Redhat Linux 8 o posteriores

  • Compilador: Clang 20.1.8

  • Cadena de herramientas de compilación cruzada: v26 basada en Clang 20.1.8

• macOS

  • SO recomendado: macOS Sonoma 14 más reciente

  • SO mínimo: macOS Sonoma 14.0

  • Xcode recomendado: 15.4 o posteriores

  • Xcode mínimo: 15.2

  • SDK de macOS compatible: 14 y posteriores

  • Nota: las versiones compatibles de Xcode se han rebajado desde UE 5.6 debido a algunos problemas con la compilación y la vinculación al utilizar las últimas versiones.

• iOS/tvOS/iPadOS/visionOS

  • Versión recomendada del SO: macOS Sequoia 15 más reciente

  • SO mínimo: macOS Sonoma 14.5

  • Versión recomendada de Xcode: 26.1.1

  • Versión mínima de Xcode: 26.0

  • Versiones de SDK objetivo compatibles: iOS 17 o posterior

  • Versión compatible del SDK de iOS: 17 o posterior

  • Versión compatible del SDK de iPadOS: 17 o posterior

  • Versión compatible de SDK de tvOS: 17 o posterior

  • Versión recomendada: visionOS 2.4 con Xcode 26.1.1

  • API de gráficos para iOS: Metal 2.4 - 3.1

  • Otras notas

    • Shader Model 6 (SM6) requiere iOS26+ con un dispositivo Apple con chip A17Pro o superior. Esta compatibilidad aún está en fase beta y no la recomendamos para producción de momento.

• Android

  • Android Studio Koala 2024.1.2 Parche 1 del 17 de septiembre de 2024

  • Android NDK r27c

  • SDK de Android

    • Versión recomendada: SDK 35

    • Mínimo para compilar UE: SDK 34

    • SDK objetivo predeterminado para el envío: SDK 34

    • Nivel mínimo de instalación de SDK: SDK 26

    • Versión recomendada de AGDE: v26.1.102

    • Versión mínima de AGDE: v23.2.91

  • Build-tools: 35.0.1

  • Tiempo de ejecución en Java:

    • OpenJDK 21.0.3 (16 de abril de 2024)

    • Entorno de tiempo de ejecución OpenJDK (versión 21.0.3+-12282718-b509.11)

    • Servidor de VM OpenJDK de 64 bits (versión 21.0.3+-12282718-b509.11, modo mixto)

  • Otras notas

    • UE se ha actualizado para utilizar Gradle 8.7 y la versión del complemento de Gradle para Android (AGP) que utilizamos se ha actualizado a la versión 8.5.2. Si utilizas Android Studio para depurar, te recomendamos que utilices Android Studio Koala. Ladybug también funciona, pero no actualiza Gradle o AGP desde las versiones anteriores.

    • Cuando elijas tu nivel de NDK, deberías optar por android-26, que admite Android 8.0+.

• EOS

  • 1.19.1.2-53289219

• Steam

  • 1.64

• Switch

  • Versión predeterminada del SDK: 21.4.2

  • Versión predeterminada del firmware: 21.2.0-1.0

  • Versión mínima del SDK: 20.5.6

  • Versión mínima del firmware: 20.0.0-10.0

  • Administrador de paquetes de Nintendo: 1.8.2

  • IDE compatible: Visual Studio 2022

• Switch 2

  • Versión predeterminada del SDK: 21.4.2

  • Versión predeterminada del firmware: 21.2.0-1.0

  • Versión mínima del SDK: 20.5.6

  • Versión mínima del firmware: 20.0.0-10.0

  • Administrador de paquetes de Nintendo: 1.8.2

  • IDE compatible: Visual Studio 2022

• PS4

  • Versión predeterminada del SDK de Orbis: 12.508.031

  • SDK de Orbis mínimo: 12.008.011

  • Software del sistema: 13.508.001

  • IDE compatible: Visual Studio 2022

• PS5

  • Versión predeterminada del SDK de Prospero: 13.00.00.35

  • Versión mínima del SDK de Prospero: 12.00.00.38

  • Software del sistema: 13.20.00.06

  • IDE compatible: Visual Studio 2022

• ARCore

  • 1.48

• ARKit

  • 4.0

• OpenXR

  • 1.1.46

  • Los tiempos de ejecución de OpenXR 1.0 y 1.1 son compatibles y cualquiera de los dos puede deshabilitarse en la configuración del proyecto.

Notas de lanzamiento

AI/ML

New:

• Learning Agents: Remove firing OnAgentsAdded and OnAgentsRemoved if they are empty.

• LACombat: Split schemas into a separate map and make recordings filterable with tags.

Bug Fix:

• Learning Agents: Fix memory leak in LearningAgentsRecorder.

MCP

New:

• Added an assistant toolset for animation features.

Bug Fix:

• Fixed boolean type parsing issue with ECA Bridge.

Neural Network Engine (NNE)

New:

• Upgraded ONNX Runtime to 1.24.3 and DirectML to 1.15.4 in the NNERuntimeORT plugin.

• Upgraded the NNERuntimeIREE third-party compiler, runtime, and tools to IREE 3.11.0.

• Added per-model compiler flag settings for the NNERuntimeIREECpu runtime.

• Added.mlpackage import support to the NNERuntimeCoreML runtime.

• IREE runtime trace zones from NNERuntimeIREE are now captured by Unreal Insights in non-Shipping configurations.

Deprecated:

• Removed: Dropped the NPU execution interface from the NNERuntimeORTDml runtime.

Animation

New:

• Added accessors for Vector and Quaternion attribute types to SkeletalMeshComponent.

• Marked UAnimNotify as EditInlineNew.

• Added virtual Merge function to UAssetUserData.

• Made the Animation Curve Debugger Widget read-only per default.

• Added a remap (v, min_in, max_in, min_out, max_out) function to the Curve Expression plugin. This function remaps the input value such that its value within the in_min/max range is linearly mapped to the out_min/out_max range, much like the FMath::GetMappedRangeValueClamped C++ function.

Bug Fix:

• Fix infinite loop in rich curve feature point search function.

• Remove improper usage of FKeyHandle constructor Reduces unique key ID churn.

• Fix for PoseableMeshComponent for when Skeleton changes during its lifetime.

• Makes AnimationEditorPreviewScene and the EditableSkeleton (more) robust to the Skeleton being deleted.

• Fixed restoring of animation position and play state in montage and animation editors after undo/redo actions.

Deprecated:

• Cleaned deprecated methods from Animation.

Animating in Engine

New:

• Curve Editor

  • The Curve Editor's frame hotkey now zooms to your selected keys' range, or falls back to the selection/playback range when nothing is selected, matching Sequencer's framing behavior.

  • Copy/pasting curves now applies the source curve to every selected target with a matching name, not just the first match.

  • The tree view now has an Organize and Sort menu which has options to Expand/Collapse Nodes, Expand/Collapse Nodes and Descendants, Expand All Nodes, Collapse All Nodes, and Sort All Nodes.

  • Added Middle Mouse Button Adds Key setting to enable or disable adding a key with the middle mouse button.

  • Ctrl-mouse wheel and alt-right mouse button now zoom horizontally even when there's no curves selected.

  • The selection range start/end shortcut binding now shares Sequencer's binding so the behavior stays consistent across both.

  • Toolbar cleanup by removing the unused All Edits button and the 'Curves' label from the pulldown.

• Anim Details

  • Anim Details now shows an option to remove all keys in the right-click context menu of its properties.

  • Anim Details now groups Control Rig properties with identical names, regardless of their relation in the rig.

    • Control Rig Controls are now grouped per property name, ignoring their parent, while common Actor properties still show grouped per parent Actor Components as previously.

    • Groups now show the control name if multiple parents with identical name are multi-edited and "Multiple" only if controls of different short names are multi-edited.

    • Groups now show a tooltip listing up to 5 controls when multi edited.

• Added Blueprint functions Open Pose Library Tab and Close Pose Library Tab.

• Snapper settings are now saved as user preferences.

Bug Fix:

• Curve Editor

  • Normalized and Stacked views no longer collapse all keys to the bottom when the curve values are nearly identical.

  • Improved interaction by not changing curve selection if there's nothing to change and not transacting key drags if there's no movement.

  • The Normalized view now respects the Frame Output Padding setting instead of using a hardcoded 10% margin.

• The time offset filter now handles pre and post infinity extrapolation by wrapping around.

• Tween slider now responds to both its primary and secondary keyboard shortcuts.

• The Tween Slider no longer fails to show up if the mouse is too close to the left border of the viewport.

• The pose browser now maintains its configuration and doesn't rebuild each time a pose is selected.

• Anim Layers UI now follows add/remove/duplicate layers and undo/redo, regardless of whether controls are selected or not.

• Enums now show their keyed status in Anim Details.

• Changes to bool, float and int properties in Anim Details are now reflected in Sequencer.

• Selecting plain Location Controls in Anim Details now filters channel curves correctly.

• Control Rig and Sequencer: Fixed Control rigs recreated with "Recreate Control Rig with New Settings" reverting to default setting when entering PIE.

Character Customization

New:

• Added support for Chaos ClothAssetSKMClothingAsset.

• Renamed Passthrough nomenclature to Object. This new naming convention gives insights to the user when a UObject is created.

• Merged Texture and Passthrough Texture nodes.

• Added new Skeletal Mesh type and nodes. This new type allows users to work at Skeletal Mesh level without having to enumerate all Mesh Sections.

• Converted Add To Component SKM node to Modifier Skeletal Mesh Merge.

• Added Skeletal Mesh output pin to Skeletal Mesh Parameter node.

• Added the "Skeletal Mesh Modify" node.

• Removed one Game Thread tick when Updating. Updates now can take a minimum of two ticks.

• Added Asset User Data type and nodes.

• Added new UAssetUserData type and nodes.

• Added the "Mesh Transform with Bone" node to serve as an inlined version of the modifier node with the same name.

• Added the "Remove Mesh" node.

• Implemented Parallel Updates. Now MIPs and LODs and Initial Updates can be generated in parallel.

• Added support for Clothing in Skeletal Mesh parameters.

• Components now can have the same name.

• Added the option to taking the ownership of generated resources. Mutable will not modify or reuse them.

• Added Material Override pin to components.

• Added the "Skeletal Mesh Break" node.

• Added Passthrough Skeletal Mesh pin to Node Passthrough Skeletal Mesh Component.

• Added Passthrough Texture Parameter node.

• Added custom External Operations. Allows users to create new operations. Very experimental!

• Moved Modifier Skeletal Mesh Mesh LOD Pins to a Skeletal Mesh Make.

• Marked Transform in Mesh nodes as deprecated.

• Added an option to define the maximum UV layout size, in blocks, for the Mesh Section and Material Modify nodes. The size of runtime-generated textures is derived from the 'Max Layout Blocks' setting and the in-game size of the reference textures.

• Hidden compile properties when a CO is a Child.

• Removed Parameter Profiles.

• Removed Node Copy Mesh Section.

• Added support for SkinWeightProfiles in Skeletal Mesh Parameters.

• Removed CO States tab.

• Hidden Child Object properties when it is not the root.

• Removed selector list from Mesh Morph. Now it is a simple string.

• Optimized Skeletal Mesh merge operations.

• Added Skeletal Mesh Break node.

• Added NodeSwitch for Skeletal Mesh Objects.

• Added Skeletal Mesh Merge node.

• Added the "Skeletal Mesh Morph" node.

• Improved usability of the debugger by adding the option to color the tree of operations using the operation data type.

• Add Serialization Support for Material Params in LoadDescriptor.

• Optimized mutable runtime performance by transforming chains of conditional ASTOps into switches.

• Changed Group Type option names.

• Allowed Reroute Node to have multiple outputs.

• Refactored the Mutable system tick to reduce the time spent on game-thread.

• Improved mutable runtime performance by the removal of the "Task_Game_LockCache" task from the Customizable Object Instance update.

• Optimized Game Thread BuildOrCopyClothingData.

• Image layer operation optimizations.

• Added support for Skeletal Meshes with unlimited bone influences in Skeletal Mesh Parameters.

• Added support for Skeletal Mesh sockets in Skeletal Mesh Parameters.

• Improved the reporting of cyclical CO references.

• Moved all functionality of the Passthrough Mesh Component" node into the "Skeletal Mesh Component" node. Removed "Passthrough Mesh Component" node.

• Allow use of Skeletal Meshes without NeedsCPUAccess enabled in Skeletal Mesh Parameters.

• Real-time morph generation optimizations.

• Added support for PhysicsAssets in Skeletal Mesh Parameters.

• Remove LOD limiters CVars.

• Moved loading CO hierarchies from synchronous to asynchronous.

• Make FCustomizableObjectInstanceDescriptor Load/Save functions safer.

• Removed Share Projector Between LODs optimization.

• Added backward compatibility support to Customizable Object Macro libraries to update nodes within macros.

• Changed Break Skeletal Mesh node color.

• Removed Low Priority Textures.

• Removed Material references from Generated Textures in Texture Analyzer.

• Added colors to Performance Analyzer.

• Added 'Bone Pose Priority' property to object group nodes to resolve conflicts when merging meshes with different poses.

• Added the option to define the output prefix for the assets generated by the mutable Customizable Object Instance Baking operation.

Bug Fix:

• Fixed "Clip mesh with UV Mask" operation not loading the appropriate texture mask mip.

• Fixed an issue with MinQualityLODLevels where the streamer would request Skeletal Mesh LODs below the platform MinLOD setting.

• Fixed actor creating more components than it should.

• Fixed high video memory usage when generating a lot of meshes in the CustomizableObject editor.

• Fixed modifier nodes not being able to display the UVs of mesh section nodes that did not define at least one non-automatic tag.

• Hair Strands Mutable: Fixed check failure when trying to create a new UObject from the PostLoad of the "Groom Constant" node.

• Fixed OOM crash when moving a slider.

• Fixed modifier nodes missing the input "RequiredTags" input pin on node refresh.

• Fixed unable to save baked resources if they contain invalid characters.

• Fixed multiple cases where the messages produced by mutable did not get exposed in the "Stats" Customizable Object editor tab.

• Fixed "unable to remap pin" warning during the update of the "CONodeMeshMorphStackDefinition" backwards compatibility code execution.

• Fixed compilations not using the root CO compile options.

• Fixed multiple issues with Reshape nodes.

• Fixed wrong order of the Customizable Object versions array making a backwards compatibility related fix for a missing pin be performed after it was required.

• Fixed modifiers always applying when All Required + No Tags.

• Fixed bake operation not re-compiling the Customizable Object when the compiled data is outdated.

• Fixed an issue where Skeletal Mesh Component nodes added to child Customizable Objects were ignored.

• Fixed crash when the RunCode operation was aborted when the material parameter could not be found.

• Fix for automatic compilation in editor not picking up on changes from in a Customizable Object Macro Library. Now changes will be picked up on autocompilation and be represented in the output.

• Fixed PrepareUnrealCompression Game Thread check.

• Fixed ImagePixelFormat not being used in Bake.

• Fixed crash when validating Customizable Objects.

• Fixed Code Viewer stack overflow crash with large COs.

• Fixed a memory leak when converting Skeletal Meshes from Skeletal Mesh Parameters at runtime.

• Fixed ensure when registering to Movie Sequence Template actors using HairStrandsMutable.

• Fixed Customizable Object being GC during package splitter.

• Fixed an issue with Skeletal Mesh streaming where streamed LODs remained in memory until the Skeletal Mesh was destroyed.

• Fixed Material Switches losing its type.

• Fixed Extension Data not being applied when an Instance is already generated.

• Fixed crash if the PinType is None.

• Fixed modifier nodes not showing the custom tags explorer UI element.

• Fixed morph-related error messages not having the node context set in them.

• Fixed UVs changing precision when streaming.

• Fixed crash when failing to stream an Image.

• Fixed scaling issue with the Layout areas caused by the unrequired clamping of the layout areas when not really needed.

• Fixed crash when removing all vertices of a cloth section.

• Fixed cloth crash when streaming was enabled + using a Remove Mesh node.

• Fixed the "FCustomizableObjectMeshStreamIn" tasks leaks that caused the "FLiveInstance" and "FCustomizableObjectMeshStreamIn" objects to be wrongfully kept in memory.

• Fixed Callback check when Streaming in FCustomizableObjectMeshStreamIn.

• Fixed PSO check with grooms.

• Fixed crash when deserializing meshes with cloth.

• Fixed CO always automatically compiling.

• Fixed CO loading hang when a Child Object was not properly connected to a group.

• Fixed loading incorrect CO hierarchies.

• Fix Mutable compilation crash.

• Fixed crash during the generation of a Mutable Mesh from a Static Mesh.

• Fix crash when converting constants that had as a child an IM_REFERENCE.

• Made the "Material Modify" editor node ignore the non-input pins during the node compilation.

• Fixed case where an error during the COI update made it still eligible for being updated each time the ticker got ticked.

• Fixed crash when opening an empty CO.

• Fixed crash in ConvertSkeletalMeshToMutable when the SkeletalMesh is missing.

• Fixed late initialization of the NeedsCPUAccess flag for FSkinWeightVertexBuffer.

• Fixed crash when opening the Code / Graph Viewer without model.

• Fixed parameter discoverability issue when multiple UVs require layout generation.

• Fixed crash with Mesh and Image parameters being nullptr.

• Fixed reported Task times in Performance Analyzer.

• Fixed Dataless crash when streaming inline SKM LODs.

• Fixed modifiers not being applied correctly with optimization None.

• Fixed GetModelResources crash when cooking.

Deprecated:

• Deprecated ComponentIndex in favor of ComponentName in CustomizableSkeletalComponents. Moved the remaining CustomizableSkeletalComponent properties to private.

• Removed the option to generate 'Only manually created LODs' in favor of automatic LODs.

Control Rig

New:

• Control Rig Physics

  • Implements the per-body PhysicsBlendWeight.

  • Setting the StepPhysicsSolver alpha value to 0, disables simulation, switches the node to a cheap pass-through mode, and prepares the simulation to restart if alpha is subsequently set > 0.

  • Add support for acceleration vs force mode (a simple toggle) in controls.

  • Add an option to scale damping by inverse mass. This is to allow users to choose whether damping acts to simply calm down the simulation, vs behaving more like drag (air resistance)

  • Support resetting the simulation if the absolute time between updates is above a threshold.

  • Improves the way that settings for the solver and simulation space motion etc are exposed.

  • Adds "GetPhysicsBodyExists" and similar Get calls for the other types of component.

  • Add cvars for debug visualization control.

  • Control Rig Physics now supports convex shapes. Note that this is especially useful when importing from a physics asset using convex shapes.

  • Control rig physics supports continuous collision detection (CCD) as an option on the solver and individual bodies.

  • Control Rig Physics plugin is now enabled by default.

  • Control Rig Physics optimisations/speedups.

  • Improve tooltips/help.

  • Rename BonesToUse to BoneMask in relevant nodes.

  • Improve instantiation from a physics assert, to let modular rigs work better. Now physics on the whole character can be instantiated limb by limb, and the junctions will not be missing joints/controls.

  • More get/set functions exposed to the control rig graph.

• RigVM

  • Added new math node "Get Rotation from X Vector"

  • Added "Sphere Trace By Profile" and "FRigUnit_LineTraceByProfile"

  • Control Rig/RigVM: Add support for text rendering with DrawText().

  • Allow structs within RigVM to implement ImportText for cache management purposes.

  • Improve usability of the RigVM Print node - defaults to display for a single frame, and the duration is more clearly exposed.

  • Clarify RigVM help text for some trig functions.

    • Adds a maths "Wrap" function to RigVM.

  • Removed RigVM cached handles array from instances, as a memory saving optimization This also eliminates the need to patch handles for each instance initialization (it generates patched handles on the fly for each instruction).

  • RigVM now preprocess handles using offsets at CDO creation Added cvars to allo tweak / disable RigVM parallel_for on some platforms.

• Add an option to directly edit redirector nodes.

  • New option in Editor Settings → Rig VM Editor → Direct Reroute Node Editing, disabled by default.

  • When enabled, reroute nodes are dragged by default, and create connections with Ctrl-Drag.

  • When enabled, when double clicking near a line, a reroute node is created and connected to the nearby line.

• Control Rig Dynamics: This is a new experimental plugin that adds support for fast physically-based dynamics in Control Rig. This allows simple cosmetic dynamics to run significantly faster than the equivalent Control Rig Physics setup, making it better suited to gameplay scenarios.

• Rework space editing, add multi-editing support.

  • When selecting multiple controls in a viewport, spaces can now be edited for all selected controls.

  • The add spaces menu now only shows valid spaces.

  • The bake spaces dialog now shows custom spaces.

  • Adding the default parent no longer adds a duplicate parent entry, the default parent is briefly highlighted instead.

• Add an option to show only empty sockets in the schematic viewport, defaults to true.

• Add cut, copy, paste and delete commands to the graph node's right click context menu.

• Control rig physics and dynamics: Add debug UI for physics and dynamics, activated by buttons on the Control Rig editor toolbar. Also added to the Tools→Debug menu, as this can be used during PIE too.

• Make baking to control rig procedurally equivalent to the UI codepath in terms of how we deal with pre-existing control rig tracks.

• Allow physics control rig users to differentiate collision against world bodies by collision type (i.e. physics, query, probe). Also refactor ISM specific code to simplify implementation.

• Improve settings.

  • Separate menu settings between level editor and asset editor.

  • Settings for the level editor are now stored where applicable.

• Curves referenced in the graph are now highlighted in the Curve Container tab.

• In a Control Rig Graph dragging from a node and pressing F now spawns a for each node.

• Fix for CRP to correctly add world bodies that are owned by instanced static mesh components.

• Add a new option "Compile Resets Solve Mode" in the Event Queue menu, default to true.

• New hotkeys Editor Viewport:

  • Bones: Alt-B

  • Controls as Overlay: U

  • Nulls: G

  • Sockets: H

  • Axes on Selection: J

  • Graph:

  • Profiling: P

  • Next Event Queue: M

  • Prior Event Queue: Shift-M

  • Toggle Forwards and Construction: Ctrl-M

  • Rig Hierarchy:

  • New Socket: Ctrl-K

  • Module Hierarchy:

  • Show Secondary Connectors: Ctrl-Shift-1

  • Show Optional Connectors: Ctrl-Shift-2

  • Show Unresolved Connectors: Ctrl-Shift-3

  • Duplicate: Ctrl-D.

• Add an option to duplicate Modules from the Module Hierarchy context menu.

• Rig modules now can add an Array Size Rule for Connectors to express the expected number of connections.

• Searching the Module Hierarchy in Modular Rigs now also finds entries by the Control Rig Module class when said column is visible.

• Anim Outliner, Anim Details, Sequencer and Curve Editor now show Controls in the same order.

• Set Default Match is now a template node that accepts both single connectors and an array of connectors.

• The Modular Rig Hierarchy Tree View now supports recursively expanding/collapsing elements by Ctrl-clicking nodes.

• Creating a Control Rig asset in the content browser now allows picking Rig Module in addition to Control Rig and Modular Rig.

• Connectors in Modular Rigs can now also be dragged from the details panel.

• Improved columns in the Modular Rig Hierarchy.

  • Columns can now be shown or hidden when right clicking the header.

  • Added new columns Module Class and Module Tag, both hidden by default.

• Modular Rigs now show the Schematic Viewport when dragging modules.

• The Modular Rig Editor now shows the class name and a browse to asset icon along with the class path in Details.

• Mirror settings are now stored per project per user.

• The Modular Rig Hierarchy editor now stores the connector visibility filters per project per user.

• Views where Connectors could not be reordered now show a small icon to declutter the view.

• Modules in Modular Rigs now show a combo box to select Control Shapes, including Shapes from the Shape Libraries of the Module's Control Rig, Shape Libraries of the Modular Rig and Direct Mesh Control Poly Groups.

• Connectors in Rig Modules now have a description property which the Modular Rig Hierarchy displays as a tooltip.

Bug Fix:

• Control Rig Physics

  • Clamp strength so that values < 0 don't cause unwanted behaviour.

  • Fix parent-space controls not finding the parent body when instantiating from a physics asset.

  • Fix serialization of shapes (name and ContributeToMass).

  • Ensures that world objects get initialised in the collision system properly: Fixes problems with objects not colliding unless they have moved.

  • Improves/fixes some automatic collision shape generation.

  • Collision fixes for when bodies have no shapes.

• RigVM

  • Fix for inline edit conditions not getting updated when toggled.

  • Missing comma in python print for add_reroute_node_on_pin.

  • RigVMEdGraph call PostEditChange after calling modify in RemoveNode.

  • Update RigVM function reference nodes when adding or removing variable references to the contained graph.

  • Avoid RigVM crash when there is a function with a missing pin in the injection data.

  • Disabled RigVM function parameter customization on aggregate nodes.

  • Fixed RigVM NotEqual operand.

  • Fixed RigVM debug info use after delete leading to crashes.

  • Fixed RigVM equal dispatch node type check to allow comparing compatible types, like enums with uint8 encoded enums.

• UAF

  • Fix for not being able to clear uobject references on rig vm properties via the details panel.

  • Crash fix for mixed usage of 16bit and 32bit pose indices in AnimNextControlRigPoseAdapter.

    • Fix incorrect accessor ControlRigPoseAdapter::GetGlobalPose() actually returning the local pose.

• Control rig dynamics and physics: Clear arrays during initialisation. This has no effect in normal use, but when using the COntrol Rig Construction Event mode, it prevents these arrays from unbounded growth.

• Fixed for some Control Rigs not correctly centered on asset editor start.

• Move to using a struct for world object keys to avoid potential collisions within TMap when previously using hashes as keys.

• U Rig Hierarchy::CanCauseCycle no longer ignores inactive parents, no longer ignores inactive parents, which previously could cause cyclic dependencies.

• Ensure that all run once events are cleared at the end of Execute. This prevents any custom run once events from being run every frame.

• Fix a crash in ControlRigParameterTrackEditor when Controls are selected outside of the game-thread, for example during undo/redo.

• Fixed Control Rig copy hierarchy reallocate elements breaking the target elements subindex.

• Fix for an issue where get user data was failing to find uobject types in the RigVM asset registry due to incorrect formatting on the type strings.

• Control Rig crash fix for use after delete at control shape creation.

• Fix issues with rendering bones and local rotation axes in level editor and asset editor.

• Frame Selection (F) now works in the Control Rig Editor.

• Modular Rig modules can now be rearranged within their parent after undo/redo.

• Control rig assets are dirty upon re-opening.

• Fixed Control Rig AST generation, to avoid function entry variables being included in scope blocks.

• Adding the first bone to a Control Rig and undo/redo now restores the bone.

• Fixed Control Rig function parameter type selection not allowing array types.

• The Modular Rig Hierarchy now allows reordering Modules within the same parent as expected.

• Connector Rules are now respected when selecting elements in Modular Rig Details.

• Fix an issue in the Modular Rig Editor where the reorder handle for Array Connectors was not visible.

• Fix various issues in Module Hierarchy's functionality.

  • Mirror modules now mirrors children and retains the mirrored sub-hierarchy.

  • Fix details are not refreshed when a connection array is cleared in the module hierarchy.

  • Fix clearing connector arrays with related button did not clear the array.

  • Fix the details view did not update when the connector array was cleared.

  • Fix the last connector in a connector array could not be removed.

• Fix for the GetChainLength function to return the total chain length instead of the average.

• Control Rig Modules Connector Details no longer show the connectors as array when the Is Array property is set to false.

• The Rig Hierarchy and the Module Hierarchy now keep their selection and expansion after compiling.

• Fix issues where the Module Hierarchy did not always allow scrolling. Issues where Connectors are displayed in the Module Hierarchy remain in certain cases.

• Fixed debug draw smearing on Control Rig.

• Fix an issue where Control Shapes remained partially selected in Modular Rigs when a Rig Module was compiled.

• Fix Control Rig import from text heap use after free, due to the relocation of the element transforms after adding a new element.

• Fixed Modular Rigs overrides causing an infinite recursion in the tagged property serialization.

• Fixed a Control Rig crash adding a graph after renaming another newly added graph.

Deprecated:

• Deprecate FRigControlElement::Settings direct Blueprint access -- adds deprecated UPROPERTY so existing BP graphs still work with warnings, and adds GetControlSettings(Key) BlueprintCallable as the migration target.

• Cleaned deprecated methods from UAF (up to 5.6).

• Cleaned deprecated methods from RigVM (up to 5.6).

• Cleaned deprecated methods from Motion Warping (up to 5.6).

Deformer Graph

Bug Fix:

• Deformer Graph

  • Fixed crash when using secondary skeletal mesh component binding in a deformer graph.

  • Fixed various crashes and assertions in Deformer Graph when it is used in a Control Rig while Asset Save is ongoing.

• Fix issue where deformer settings were lost during bp component reinstancing process.

Gameplay

New:

• Pose Search

  • PoseSearchDatabase editor multi selection improvements.

  • Pose Search databases created for Chooser Columns now default to BruteForce, since KD Tree usually fails with external filtering.

  • PoseSearchColumn support for unique PoseSearchDatabase per row.

  • PoseSearchColumn (motion matching integration with choosers) bug fixes.

  • PoseSearch plugin motion matching drawing bug fixes.

  • Added a project setting (Project Settings → Pose Search → MaxDatabaseEditorPreviewActors, default 50) that caps the number of actors spawned in PoseSearchDatabase editor.

  • U Pose Search Interaction Asset::CalculateWarpTransforms improvements.

  • Added Experimental BlueprintCallable UPoseSearchInteractionLibrary::MotionMatchMulti, new API to perform multi character motion matching searches without any frame delay.

  • New PoseSearch plugin Blueprint callable OverridePoseHistoryFromOwningMesh function to override the pose history pose with the mesh pose to enable, for example, motion matching physics poses.

  • Added UAnimNotifyState_PoseSearchSamplingRange notify state, used to to include animation segments into PoseSearchDatabases.

  • Strip out disabled PoseSearchDatabase animations during cook.

  • Fix montage trajectories not working when operating on pawns not characters.

    • Make montage prediction CVar `a.PoseSearchTrajectory.UseWarpedMontage` affect Mover / when using predictor as well.

  • Add support for experimental posesearch generation of warped montage trajectories.

    • Remove all direct actor transform references from root motion modifiers.

    • Add 'UMotionWarpingTrajectoryAdapter' which may optionally exist on a 'UMotionWarpingComponent' to predict trajectory.

    • Add `FRootMotionModifierSwapState` to store warping state pre-prediction and restore state post prediction.

    • Add "Prediction Mode" to 'UMotionWarpingComponent' where it uses the swap state / new adapter to predict warped trajectories.

    • Add Experimental `UPoseSearchTrajectoryLibrary::PoseSearchGenerateWarpedTransformTrajectory` to generate warped trajectories.

    • Add `GVarPoseSearchTrajectoryUseWarpedMontage` to enable warped montage trajectories by default.

  • Improved UPoseSearchInteractionAsset warping calculations.

  • Removed some UE 5.6 deprecations from PoseSearch plugin.

  • Optimized PoseSearchDatabase DDC key generation by removing template objects.

  • Renamed few motion matching stats from the PoseSearch stat group (Search Brute Force, Search PCA/KNN, Search VPTree, Search Event into PoseSearch Brute Force, PoseSearch PCA/KNN, PoseSearch VPTree, PoseSearch Event).

• Account for mesh scale when calculating Motion Warping warp points. Enable with a.MotionWarping.UseMeshScale.

• Exposed UMotionWarpingComponent::FindWarpTarget as BlueprintCallable.

• Add handling for angular velocity to trajectory history tracking so that spinning platforms are handled properly.

• Add Anim Node Functions to support applying a delta to the offset root bone's internal simulated transform.

• Added UCurveFromSyncMarkersModifier to generate a curve from synch markers.

• Added Blueprint-exposed ResetSync function to reset sync group information on Anim Graph.

• Removed experimental MotionMatchingInteraction node.

• Add a OnInputDeviceHardwareInfoAvailable delegate to the input device mapper, which allows for code to bind to connection events and be guaranteed to run before other systems like Common Input/User code. This makes it possible for the UInputDeviceSubsystem to query the FInputDeviceScope, and make the necessary associations of the known hardware device Id to the new FInputDeviceId.

• Sync group support for follower blendstacks.

• Optimized motion matching interactions performance with a custom hash grid.

• Defaulted motion matching trajectory generation in mesh space rather than using the Character.View.Rotation.Yaw when the character is set to orienting the rotation to movement.

• Added URootMotionModifier_Blueprintable, new MotionWarping URootMotionModifier blue print overridable.

• Motion matching interaction performance improvements.

Bug Fix:

• Pose Search

  • PoseSearchDatabase fix for not being able to copy paste in an empty database.

  • PoseSearchDatabase DDC key generation fix, to support objects with duplicated down dependencies.

  • Fixed a bug where for inconsistent past velocities in motion matching due to history points being offset by delta time, causing noise in past velocity when delta time is not constant.

  • Fixed PoseSearchDatabase editor preview of static mesh attachments.

  • Fixed PoseSearchSchema velocity channel debug visualization.

  • Fix for PoseSearchDatabase indexing looping animation assets.

  • Fixed crash in FAsyncPoseSearchDatabasesManagement::RequestAsyncBuildIndex when database dependent animation assets failed to compress.

  • Fix for missing PoseSearchDatabase indexing on reverting and reloading dependent assets.

  • Fix for UPoseSearchFeatureChannel::CanBeNormalizedWith.

  • Fix for missing FMemMark(s) in FPoseSearchColumn::Filter and FPoseSearchColumn::SetOutputs.

  • Fix for PoseSearchDatabase DDC key determinism when supporting Choosers PoseSearchColumns.

  • Making sure there're no flying animation tasks when on game thread by calling GetProxyOnAnyThread, so it's safe to access animinstance variables in UPoseSearchLibrary::MotionMatch.

  • Fix for UPoseSearchLibrary::MotionMatch crashing when reusing an invalid continuing pose from a previously evaluated schema.

• Motion Warping

  • Add an "AdditionalRotationOffset" in the root motion modifier that allows rotational offset to be specified per animation. This avoids conflicting rotations when warp points are used by multiple different actions. Note that any setup using a rotational offset with facing mode will need to be manually adjusted (this was introduced in 5.7).

  • Deprecated EMotionWarpRotationType::OppositeFacing and EMotionWarpRotationType::OppositeDefault since they can be achieved with an additional rotational offset of 180 degrees (existing data will be automatically converted).

  • Stop using the warp point's rotation offset when in facing mode.

• Fix for crash while changing levels because of invalid FRewindDebuggerTrajectory::WorldToVisualize.

• Fix to allow the DisplayWorldId to be set while analyzing local sessions. Without this, the debugged mesh is lost after the PIE session ends.

• Fix montages do not mark blending out sources as inactive.

• Fix for previewing game generated pose search debugger data with the editor.

• Fix for SearchThrottleTime not working properly in FAnimNode_MotionMatching::UpdateAssetPlayer and FMotionMatchingTrait::PreUpdate.

• Fix for crash in USkeletalMeshComponent::ForEachBodyBelow when instantiated Bodies do not match the SkeletalBodySetups in the Reference Skeleton Mesh.

• Fix for FAssetIndexer::Process crashing on schemas with roles improperly setup.

• Fix issue where GetPoseIndex could return an invalid pose index when there are multiple sampling ranges on the same animation asset.

Deprecated:

• Removed 5.6-deprecated PoseSearch methods.

• Deprecated: UPoseSearchFeatureChannel_Curve::BP_GetCurveValue, UPoseSearchFeatureChannel_Heading::BP_GetWorldRotation, UPoseSearchFeatureChannel_Velocity::BP_GetWorldVelocity, UPoseSearchFeatureChannel_Position::BP_GetWorldPosition, in favor of UPoseSearchFeatureChannel_Curve::BP_GetCurveValueFromContext, UPoseSearchFeatureChannel_Heading::BP_GetWorldRotationFromContext, UPoseSearchFeatureChannel_Velocity::BP_GetWorldVelocityFromContext, UPoseSearchFeatureChannel_Position::BP_GetWorldPositionFromContext, taking the more versatile FChooserEvaluationContext as input.

IK and Retargeting

New:

• IK Retargeter

  • Override Set editor: Add Child, Search Bar, Keyboard Shortcuts, Duplicate, Reordering

    • Added DuplicateRetargetOverrideSet() to the controller API (Blueprint/Python callable). Creates a new override set with a unique name, copying all property overrides, parent assignment, and active-by-default state from the source set.

    • Added "Duplicate" entry to the Override Set tree view context menu between Rename and Unparent.

    • Add Child: Context menu action to create a new override set parented under the selected set.

    • Search Bar: Enabled the built-in details panel search bar for the Override Set editor.

    • Reordering: Added ability to reorder override sets in override set tree.

    • Keyboard Shortcuts: Delete/Backspace deletes selected override set, F2 renames it.

    • Override Set Reordering: Fixed drag-drop to distinguish between reordering (AboveItem/BelowItem) and parenting (OntoItem). Added DisplayOrder field for persistent sort order. Reordering makes the dragged set a sibling of the target at the correct position.

  • Expose bRetainAdditiveFlags to RunBatchRetarget Blueprint/Python API.

    • Added bRetainAdditiveFlags to FIKRetargetBatchOperationInputs so that Blueprint and Python scripts can control whether additive animation attributes are preserved during batch retarget.

• Updated all 17 biped templates to split the existing LeftLeg/RightLeg chains: LeftLeg/RightLeg chains now end at the ankle/foot bone (previously ended at ball/toe) New LeftFoot/RightFoot chains cover the ball/toe bone.

  • IK goals remain on the leg chains, now created at the ankle/foot bone.

  • Updated FBIK auto-setup defaults:

    • SubIterations: 0 → 10

    • Goal ChainDepth: 0 → 2

  • Updated Biped Templates,

  • Added new Templates for Blender Rigify and Meshcapade.

• Add override set dropdown to Batch Retarget window When using a manually supplied IK Retargeter in the Batch/Auto Retarget window, there was no way to select override sets.

  • Added a dropdown (FName with GetOptions) that lists available override sets from the assigned retargeter asset. Selected override set is applied to both the live preview viewport and animation export. Dropdown is disabled when using auto-generated retargeter.

• RigMapper Definition editor graph improvement: Made importing inputs/outputs from Control Rig optional through a check box in import dialogue in order to reduce clatter.

• Improved RigMapper Definition editor graph Comment nodes to fully enclose selected nodes and to trigger on "C" key command.

• Improved validation messages and notifications for RigMapper Definition editor graph. Notifications are now displayed in the graph header. Before they could be seen only in log.

• Added Math Operations feature to RigMapper Definition with a corresponding node in RigMapper Definition editor graph. This op includes all unary, binary and N-array standard mathematical operations selected through the drop down box.

• Improved zooming in/focusing a node and all connected nodes by lowering opacity to non selected nodes and zooming in/out to capture selected ones.

• Implemented Comment node feature for RigMapper Definition graph.

• RigMapper refactoring to include numerous quality of life changes:

  • Improved Undo/Redo system.

  • Persistent node positions between sessions (Graph is no longer recreated every time it is opened).

• Added feature which imports Input curves from Skeletal Mesh.

  • Fixed a problem with RigMapper Definition cache not being cleared when modified.

• Updated IKRetargeter Curve OP stack:

  • RigMapper Op is now a sub-operation of CurveRemap Op.

  • RigMapper divided into RetargetRigMapperUserDataOp which uses RigMapper Definition embedded in target mesh UserData, and RetargetRigMapperOp which contains single RigMapper Definition data asset.

  • Added possibility to select multiple RigMapper Ops in a single substack.

• Implemented RigMapper Definition Graph pin interactions:

  • Added support for breaking links from a node.

  • Added support for moving links from one node to another.

  • Implemented support for adding new connections by dragging and dropping to a different node.

• IK Rig: Allow enabling/disabling anim graph node w/ cvar a.animnode.IKRig.Enable.

• Quality of Life improvements:

  • Allowed adding more pins to nodes and automatically generating connections to other nodes.

  • Fixed a bug with importing a Definition from JSON file.

  • Added constraints when removing pins so the minimal required number of pins are preserved depending on the feature.

  • Improved memory management and performance.

• Reimplemented RigMapper Definition Graph to be interactive:

  • Nodes can be moved around, although position will not pre preserved on reopening.

  • Nodes can be created from a connection or standalone though a context menu.

  • Nodes can be updated through details panel on the right side.

  • Added a Context menu on right click on node or graph.

  • Nodes can be relinked and links can be removed.

Bug Fix:

• Fixed and improved RigMapper Linked Definition validation to include NullOutputs which are subsequently used as inputs.

• Relaxed validation of hanging inputs and outputs for RigMapper Linked and Baked Definitions to allow pass-through with a warning.

• RigMapper definitions tongue fix on RM_CDH_FNM, RM_MHH_CDH and related Linked Definitions and Baked definitions.

• Updated RM_CDH_FNM rig definition to address an issue with inverted corner sharpen and upper eyelid controls.

ML Deformer

Deprecated:

• Cleaned deprecated methods from MLDeformer (up to 5.6).

Physics Control

New:

• Physics Control Component

  • Add BP support for specifying collision ignore/include pairs - Enable/DisableCollisionBetweenBodies.

  • Enable/disable angular drives applies to slerp as well as twist/swing.

  • Make sure that limb-generated controls get automatically added to a set with the limb name.

  • Fixes for Physics Control Component names, so they're never called "". Note that this will change the names of some controls/modifiers, and if those are being referenced explicitly (by name) the assets will need to be patched up.

    • Functions added to log controls/modifiers.

    • Adds checks that controls/modifiers/sets that are passed in are valid (and optionally warns if not).

• Drives now have a Join Limit Violation Response. The available options are: Clamp the skeletal animation drive targets to joint limits, or Widen limits to accommodate the target. In addition to either respecting the joint's limit or the animation, this prevents spurious forces and torques present when drive and limits are fighting (response 'None' option).

• PhysicsControl plugin is now marked as ready for production use.

• Support for applying forces in the control rig physics and RigidBodyWithControl animation graph nodes.

Bug Fix:

• Physics Control Component: Addresses various problems with tick ordering/dependencies so that 1. it waits until the input pose is ready and 2. it ensures the tick is not pushed into PostPhysics by (for example) CharacterMovementComponent when on dynamic floors.

• Guard against the RequiredBones container in RBAN and RBWC InitializeBoneReferences having an empty reference pose (to prevent a crash).

• Fix for bad memory access when world collisions are enabled in RigidBodyWithControl or RBAN.

• Prevent PhysicalAnimationComponent crash if physics blending is enabled mid-tick.

Runtime

New:

• Anim Montage

  • Fixed montage forced position handling during advance if forced position gets updated multiple times without advancing the montage in-between e.g. on sequencer loops or with URO enabled Guarded by CVarUseForcedSequencerMontageLoopBehavior(a.Montage.UseForcedSequencerMontageLoopBehavior). Turned off by default.

  • Added additional safety checks in FAnimMontageInstance::Terminate().

  • Added guarding against negative blend times on montages.

  • Added CVar a.Montage.UseForcedFromPositionAsSubStepOrigin - if ForcedNextFromPosition is set, use it as the sub-stepping origin in FAnimMontageInstance::Advance instead of the previous internal position. Enabled by default.

• UAF

  • Add OffsetRootBone anim node.

  • Add variable container name to variable trace.

  • Translational retargeting trait.

  • Added the option to display trajectory velocity in debug log.

  • Added new OverrideRootMotionTrait.

  • Add InputValue anim node/op.

  • Add FPoseValueBundle as a typed pose overlay for FValueBundle.

  • Implicit cross-skeleton remapping at graph input boundary. Remaps poses automatically when a foreign skeleton enters a graph via PushPose so node authors never deal with cross-skeleton concerns.

  • Add the ability in UAF to specify the end tick group for events.

• RigVM

  • Add package path to some rigvm compile error reports.

  • Add CharacterMovementComponent to allowed class types in RigVM.

• Add CVar to suppress duplicate anim node slot names warning.

• Add CVar that allows for using MovieScene GUID rather than channel hashing for partial-UAnimSequencerDataModel hash (significant speed-up, downside is MovieScene GUID invalidation is non-deterministic).

• Added additional pose validity checks when getting the target transform of a bone socket references.

• Added additional pose validity checks to ConvertWidgetLocation in FAnimNodeEditMode.

• Reimplementation of "Speed up UAnimSequence::CreateDerivedDataKeyHash" - drastically decreases time spend on Animation Sequence its DDC key generation.

• Added ObjectsSelected delegate interface function to IAnimationEditor.

• Added virtual keyword to FAnimInstanceProxy::UpdateCurvesPostEvaluation.

• Allow Custom Widgets for AnimNotifies.

  • Rename

    • INodeObjectInterface → INotifyNodeObjectInterface.

    • ETimingElementType → ENotifyTimingElementType.

• Allow Custom Widgets for AnimNotifies.

  • Rename

    • INodeObjectInterface → INotifyNodeObjectInterface.

    • ETimingElementType → ENotifyTimingElementType.

• Expose certain solver collision settings to RBAN and RBWC nodes to allow for improved environmental collisions. This gives parity with functionality in control rig physics. Also added a new category for the details panels to clean up the UI.

• Expose Set/Get Accumulated Time in BlendSpacePlayerLibrary.

• Added experimental Animation Layering plugin containing:

  • Copy Bone Motion Anim Node.

  • Copy Bone Advanced Anim Node.

  • Bone Mask Anim Node.

• Added Scoped Crash Data For Animations (Make animation crashes easy to debug).

• Notify States: Added the option to not merge the lifetime of notify states on concurrent plays of the same animation asset.

• Allow for notify event dispatch to be disabled on a per-mesh component basis. This doesn't prevent the notifies from being sampled but the associated events will not be dispatched at the end of animation update when the flag is set.

• Allow priority to be set on transitions to conduits so it's possible to deprioritize them vs transitions to other states.

• Marked GetCurveValueWithDefault() in AnimInstance as const.

• Fixed description of BoneIsChildOf.

• Enable animation frame stripping cvar support in editor Useful for debugging purposes.

• Exposed AnimMontages track properties to BluePrint.

• Offset Root Bone: Added support for teleporting.

• Pose History: Added Blueprint library functions to get bone data from pose history.

• Force property access pre-event graph update callsite to be invoked prior to InitializeRootNode being called. This prevents property access errors coming from anim nodes that call GetEvaluateGraphExposedInputs from Initialize_AnyThread.

• Added standard blend for Anim Graph mirroring node.

• Add user-exposed NotifyInstanceID to FAnimNotifyEventReference. This can be used in user events to tell notify instances apart.

• Added populating the error log with names of missing skeleton bones, when a mesh has bones that do not exist in the skeleton yet.

• Removed no longer used additive total bone weight array from the BlendProfileScratchData and SlotEvaluatePoseWithBlendProfiles.

• Add 'Ignore Pose Asset Source Animation Curves' property to the pose blend node.

• Marked UAnimInstance::GetCurrentStateName as const and added const correctness in function body.

• Add filter for non-additive animations in the animation editor asset browser.

• Removed deprecated functions in USkeleton (GetSkeletonRemapping, GetAssetRegistryTags, CollectAnimationNotifies, GetRawAnimationTrackIndex).

Bug Fix:

• UAF

  • Fixed uninitialized variable ContentOnly in SRigVMFunctionPicker causing state tree function binding regression.

  • Fix: ExecuteBindings_GT not gated by external prereqs added via module dependency traits.

  • Fix for multiple copies of variable instances showing up in rewind debugger for graphs.

  • Fixed check failure on shutdown.

  • Fix for GetHostTransform not reporting the correct value until the actor has moved after spawn.

• Add handling for rare cases where anim sequence memory mapping fails.

• Ensure linked anim instances created by a post-process anim instance are not reset prematurely.

• Fix ABP linked layers crash due to stale node references during cross-asset compilation.

• Fix early check for derived anim Blueprints causing crashes when parent class skeletons were deleted Add update path for derived anim Blueprints when parent skeletons mismatch or are deleted.

• Ensure anim instance functions wait for async animation updates to terminate when called from the game thread.

• Improved Animation Notify track behavior when displayed and used at non-standard DPI level.

• Fix for inaccurate root motion playback on first loop in persona editor.

• Animation Modifiers: Fix for revert and removal when bReapplyPostOwnerChange=true.

• Fixed ensure when opening Animation Sequence containing (additive) transform curve(s).

• Addressed non-deterministic cooking behavior caused by Animation Graph Slot nodes.

• Fix for Constraint AnimNode when initial weight is zero but in the future will be non-zero.

• Fix for crash in Constraint AnimNode when changing setup while running.

• Anim Montage: Fixed prematurely calling of AnimNotifyStates end events when the montage advance is driven by forced positions and their delta is zero (e.g. from a frame-locked Sequencer with unstable frame times).

• Fix missing compatible skeleton conversion when retrieving attributes.

• Get the correct compact pose bone index rather than mesh bone index.

• Fix up missing calls to initialize FK control rig hierarchy when running in lazy init mode.

• Avoid crashing when blend space sample uses a null animation sequence.

• Always preload animation sequence dependencies as MT async loading requires manual handling.

• Fixed crash when updating blend samples in a Blendspace while PIE is running in a separate window.

• Fixed crashes caused by NaN bone transforms coming from AnimNode_StrideWarping.

• Fix for potential NaN bone transforms generated inside AnimNode_FootPlacement if root is rotated exactly 90 degrees from expected approach direction.

• Set anim group follower LeaderScore to always be less than any possible leader, to avoid selecting any follower as leader if there's any leader in the FAnimGroupInstance.

• Fixed ensure in UAnimInstance::TriggerQueuedMontageEvents.

• Skeletal mesh component now refreshes the skeletal mesh asset at PostEditImport, so the skeletal mesh is not lost after a duplicate.

• Fixed crash in DebugDrawSkeleton when using 'show bones' command.

• Validated that users are not trying to apply an anim BP preview overlay to self.

• Move leader component test earlier in CopyPoseFromMesh to make sure our bone map is updated correctly.

• Make SharedContext a unique ptr to force destruction when released in FAnimNode_SaveCachedPose::PostGraphUpdate.

• Fixed issue where Additive and Blend components within an Animation Sharing setup were not locked to LOD0, causing artifacts on non-LOD-compatible target components.

• Fix potential thread-unsafe access to skeleton remapping data. In that case of FReferenceSkeleton, limit when the remapping data is refreshed to only when it's a skeleton and not a mesh that is having it's ref skeleton rebuilt.

• Fixed CopyBonesModifier for bones without pre-existing curves.

• Fix issue with blended curve container not correctly tracking when it is sorted.

• Fix to allow notifies that are sampled via AnimSingleNodeInstance to store the current playback time. This means that UAnimNotifyLibrary functions that rely on the current time can be used on these notifies.

• Enable FBoneSocket Target Pickers in Contexts Outside Anim Montages.

• Prevented crash loading into CitySample using -dpcvars=Editor.ObjectReverseLookupMode=2.

Deprecated:

• Cleaned deprecated methods from animation runtime (up to 5.6).

• Removed non-reflected UE_DEPRECATED items (5.0-5.6) spanning Engine/Source/Runtime/Engine/{Classes, Public}/Animation, Engine/Source/Runtime/AnimGraphRuntime (+ MovieSceneTracks anim nodes), and Engine/Source/Editor/AnimGraph compiler interfaces.

• Cleaned deprecated methods from LiveLink (up to 5.6).

• UAF: Fixed incorrect deprecation logic in AnimNextComponent when loading Blueprints with data inheritance on deprecated variables.

• Deprecated CachedSoftObjectPtr in USkeleton.

Sequencer

New:

• Sequencer

  • Delete Mark is now Delete Selected Marks which allows the selected marks to be deleted at once.

  • Add Mark is now Add Mark at Playhead which adds a mark at the current playhead as opposed to where the mouse was pressed.

  • Playing a sequence in the editor now honors the time bounds (selection range when set, otherwise playback range), matching rewind and key-jump behavior.

  • Playhead scrubbing can now be limited to the selection range, in addition to None and Playback Range.

  • Bake Transform is now available from the object binding right-click menu.

  • Added missing Convert to Spawnable command binding, and route Level Sequence conversions through Convert To Custom Binding so custom-binding spawnables work.

  • Bake Transform now disables the original track instead of toggling each section, matching the Bake to Control Rig behavior.

  • Add support for Material Slots Overlay Material switching and parameter animation. .

  • Assigning a spawnable to an object property now creates an Actor Reference Track automatically, so the reference doesn't go stale when the spawnable's path changes.

  • Component Attachment tracks now respect hierarchical bias, so a higher‑priority attachment section correctly overrides a lower‑priority one when they overlap.

  • The Actor Reference track now supports Completion Mode, so disabling or muting them properly restores the prior reference.

  • Jump to Next/Previous Key now respects looping. When looping is off, it no longer wraps past the first/last key.

  • Add Selection from Content Browser is now a bindable command, so you can assign it a keyboard shortcut in editor preferences.

  • The Actor Reference track (used for properties like the Cine Camera's Look At Target) has been upgraded to Sequencer's ECS evaluation system, aligning its performance and ordering with other tracks.

  • Lighting channels on primitive components are now animatable.

  • Dragging a marked frame now translates selected keys and sections along with it.

  • Pausing the game now pauses the Sequencer clock as well (opt out via Sequencer.AllowPausedClock 0).

  • The back/forward mouse buttons now navigate forwards/backwards through sequences, matching the Blueprint editor's tab navigation.

  • Snap to Markers while scrubbing now snap to the playback start/end and selection start/end frames.

  • Markers are now also selected with Select All in Selection Range, Select Forwards, and Select Backwards. Added a new option to Select Markers in Selection Range.

  • The Add Track button for Subsequences now allows creation of custom Level Sequence subclasses.

  • Remove DisplayName="Anim Sequence" for MovieSceneSkeletalAnimationSection because it conflicts with Anim Sequence assets.

  • Add a way for stitch track to work with Animation Blueprints. This is a bit of a workaround for the issue of pose history not being able to be both read from and written to easily via an attribute, which is necessary for the stitch track. Now, the user can add an 'OverridePoseHistoryName' which, in animation Blueprint mode, will look for a pose history node tagged with that name and pull the pose history from it for use in the stitch track. This allows the pose history node to be _after_ the sequencer target node, which is necessary for blending out to work correctly. In addition, we set up an example properly in the AnimSandbox to show this working.

  • Deselect marked frames when keys and sections are also deselected. Disallow marked frame movement when they are locked.

  • Limit Viewport Selection is now in the viewport menu whenever a sequence is active (was Animation-Mode-only); UMG and Actor Sequence get the button in their own toolbar.

• Anim In Engine: Control Rig use ECS evaluation by default Users can fall back to legacy evaluation with: ControlRig.UseLegacySequencerTemplate true.

• Add SequencerTools toolset for AI-driven sequence creation and editing.

• Added call to Global Dependency Graph update cache in OnAllModuleLoadingPhasesComplete to prevent the graph's cache to update when the first sequence is played. In the event that a plugin/module that mutates this graph loads after OnAllModuleLoadingPhasesComplete, the cache will be invalidated and will be updated when the first sequence is played.

• Sequence Validator: Fixed Whole Section Ranges rule reporting incorrect results.

Bug Fix:

• Sequencer

  • Visibility Track keys are now correctly set with their current values. Visibility is inverted from their Hidden property and the setting of the key was not correctly inverted.

  • Fix FVector2f/3f/4f tracks dropping keys silently UnpackChannelsFromOperational(const FFloatIntermediateVectorand) was writing FMovieSceneDoubleChannel entries, but UMovieSceneFloatVectorSection stores FMovieSceneFloatChannel curves. When keying, the channel proxy lookup returned nullptr and the key was silently dropped.

  • Cooking a project that uses Time Warp tracks inside child Level Sequences no longer fails with an "illegal reference to private object" error.

  • The camera cut tracks which have preroll now take into account the instance transform data of a level sequence which is passed to the streaming manager.

  • Update the possessed object class when matching possessable GUIDs (including ones that bind to spawnables), so bindings no longer hold a stale class.

  • Conditional sections inside a subsequence now evaluate correctly when a parent sequence is conditionally disabled.

  • Sequences with camera rig rails are no longer incorrectly marked dirty on save. Spline components in these camera rig rails are just visualization components, and those don't need to be regenerated or have their physics state be recreated on save.

  • Fixed a RepLayout mismatch from an editor-only field in MovieSceneSequencePlaybackSettings.

  • The entity system threading model is now refreshed at each call site after ScheduleTasks, instead of inside ExecutePhase where it was computed too early.

  • Fix race condition in TEntityTaskComponents::Schedule_PerAllocation Schedule_PerAllocation on TEntityTaskComponents (the unfiltered path) was setting bSerialTasks = false, making it behave identically to Fork_PerAllocation and allowing multiple allocations to run in parallel on different threads. This violated the Schedule_ contract that guarantees serial execution of ForEachAllocation calls. The filtered variant (TFilteredEntityTask::Schedule_PerAllocation) and both Schedule_PerEntity overloads correctly set bSerialTasks = true.

  • Film overlay options menu commands no longer stop working because they were bound to a transient widget that could be destroyed when the toolbar refreshed.

  • Dragging the selection range end with the time slider now sets it as exclusive, matching the playback range behavior.

  • Fixed the inverse sequence transform calculation, correcting subsequence time mapping.

  • Setting the selection range start/end now respects the snap interval.

  • Hide Selected / Isolate Selected with no tracks selected no longer hides or isolates every track.

  • When importing an fbx, tangents are now negated when Force Front X-Axis is enabled, keeping curve shapes consistent under the flipped axis.

  • Spawn template creation now guards against a stale object of a different class occupying the same name under the same outer.

  • Material Parameter Collection tracks no longer lose their derived display name on PostLoad when the stored name was already empty.

  • Renaming a subsequence while viewing through it no longer crashes.

  • Fix bug in ECS Control Rig that left the anim instance in an incorrect state after baking an anim to control rig requiring clicking on the control rig track to get it to work correctly. This was caused by the skel anim system restore state triggering an anim instance reset after the control rig had set the new anim instance. .

  • Remove redundant RelevantComponent from UMovieSceneSkeletalAnimationSystem RelevantComponent was set to SkeletalAnimation in the constructor, which caused IsRelevant() to short-circuit to true whenever any entity had a SkeletalAnimation component, bypassing IsRelevantImpl. This meant the system would get linked even when all skeletal animation entities had the AnimMixerPoseProducer tag, which IsRelevantImpl correctly filters out. .

  • Generating a track/section/key from the keyframe button in the details panel now correctly resolves nested array properties (ie. MyArray[0].bVisible).

  • Bake Transform now gathers key times from all sections of a transform track, not just the first.

  • The Perlin noise menu now uses the display text instead of the raw channel name.

  • OnQueueSubtitles / OnAudioFinished / OnAudioPlaybackPercent delegates are re-bound (or cleared if unbound) when an AudioComponent is recycled across plays.

  • Clicking on the Render Movie button will now respect the Movie Render Queue job type (i.e. Movie Graph).

  • The object binding menu now only traverses bound objects, so spawnable template components aren't accidentally bound to new bindings.

  • Pinning a track no longer swaps the main track area's view model with the pinned area's, keeping the two views properly separated.

  • Removed ALevelSequenceActor dependency from FLevelSequencePlaybackContext.

  • Fixed a bug where conditions were not actually checked in subsequences.

  • Compiling a Blueprint while a sequence is open no longer triggers a pre‑animated state restore that could race with async loading.

  • Defer outliner reparenting that previously happened mid-iteration, fixing potential instability.

  • Toggling Net Addressable Name on a spawnable now sticks. It's no longer reset every time the object template saves.

  • Property bindings that resolve to a non‑existent array element are now flagged as invalid, instead of silently failing or evaluating against stale data.

  • Camera Cut tracks set to "Keep State" now restore to the correct view target on repeat playback, and Keep State sections following Restore State sections keep animating their properties instead of snapping back when the prior section ends.

  • Tracks that rely on cleanup callbacks (like Control Bus modulation on audio tracks) now release their resources correctly when you close Sequencer after a Play-In-Editor session.

  • Editing a property on a character's mesh component in Sequencer no longer snaps its animation pose back to the reference pose. The pose now updates correctly whether you select the actor or the mesh first.

  • Skeletal mesh animation pose no longer resets when you edit a property on a component (subobject) of the actor.

  • Fixed not being able to set just the X, Y, or Z channels of a transform for a skeletal mesh.

  • Camera Cut and Cinematic Shot thumbnails only update during PIE when the PIE world is the one bound to Sequencer, so MRG/MRQ runs don't spuriously refresh them.

  • Fix issue with baking code (and other code) that uses FindSpawnableObjectTemplate in the case that the guid passed in is a possessable that is possessing a spawnable in another sequence. We now check for that.

  • Fix crash when closing Sequencer during deferred modification flush We do this by suppressing the deferred modification flush events during the destructor.

  • Fix crash when compiling sequences with null tracks Runs 'RemoveNullTracks) before calling CompileTrack() to prevent crashes when a sequence contains null track references. We need to track down what is causing tracks to be null, but this should fix the crash as it currently exists.

  • Fix Control Rig ECS crash that happens with dynamic rigs that change the control rig channels mid evaluation. To fix this we hold a hash of the channel list in the control rig component data and if it changes we re-copy the channel pointers into the ecs component or unlink if channels no longer exist. .

  • Sections with no channels are again considered keyable (regression fix for keyable detection).

  • Fix crash when keying non-object properties in ObjectPropertyTrackEditor Adds a check to make sure the property is actually an FObjectPropertyBase before calling GetPropertyValue(). This prevents a crash when a non-object property is incorrectly routed to this track editor, as the type size assertion in GetPropertyValue would fail. fix animation/sequencer.

  • Delete Channel no longer fails to delete when only the first name in the path matches. It now matches the last name in the path which is the actual channel name.

  • Splitting or trimming a section now places boundary keys with the correct values and preserves each key's original interpolation type, so a linear curve stays linear instead of being forced into a cubic S‑curve.

  • Fixed crash when a level sequence has a null track.

  • Fixed a crash that could occur when evaluating sequences with transform origins gathered from multiple subscenes in parallel.

  • A Template Sequence section's Hierarchical Bias now initializes before config can overwrite it, so per-section overrides stick instead of inheriting the config default.

  • The viewport no longer jitters when the aspect ratio is animated.

  • Sequence players set to loop now remember their loop count after playback ends. Restarting a looping sequence plays as a loop instead of playing once and stopping.

  • Camera Cuts and other pinned tracks no longer disappear from the timeline when dragged into a folder. Sequencer now blocks drops into folders with a mismatched pinned state and shows no drop preview.

  • The time-display UI now refreshes after subsequence nested transforms update, so local time reflects the current context instead of the previous one.

  • Editing the Level Sequence Actor's Transform Origin now marks the sequence dirty so the editor re-evaluates it.

  • Whether using anim Blueprints or custom mode, the previous anim instance gets force re-initialized after sequence is over, potentially resetting data stored in the AnimInstance unnecessarily. Previously this would only occur if the skeleton changed, but we attempted to address an issue where if Custom Mode was used, the previous anim instance was getting uninitialized anyway, and would now be stuck in an uninitialized case. That fix was a bit overzealous however, as this forced re-initialization was even occurring for cases where animation Blueprints were used and we weren't switching anim mode or anim instances. This change only re-initializes if Sequencer changed (and is now restoring) the anim instance.

  • Fragment type strings for the Universal Object Locator are now encoded/decoded so characters that are illegal in object names survive serialization.

  • The audio track no longer crashes when its played from an Actor Sequence.

  • Dragging the time range slider now properly accounts for display scaling on the desktop.

  • Resolving setter functions for bool properties now strips off the leading 'b' (eg. SetVisible matches the bVisible property).

  • Sequencer no longer expands procedural channels (like Perlin noise) to the keying time when adding keys to neighboring channels. Noise tracks keep their original length.

  • Audio in Sequencer no longer restarts incorrectly when the playhead jumps, and audio that was paused or stopped stays paused instead of being restarted by a forced time‑sync.

  • Control Rig: Fix Sequencer space channel evaluation in ECS path , [at]benoit.gadreau.

  • Fixed crash on EndPlay when using a Sequencer that contains a Spawnable ChaosCacheManager.

  • Sequencer Media track: Drag/drop of media onto a track no longer crashes.

  • Sequencer ECS Control Rig: Fix issue where additive section weights were getting double-applied. The code didn't quite match the old eval template- we need to only apply weight to absolute sections since it already is getting applied to additive sections via the parameters themselves getting weight applied.

  • Sequencer Scripting: Add Key In Channel now honors the Sub Frame argument when Time Unit is Display Rate.

  • Sequencer Control Rig: Fix issue where if multiple parameters with different types have the same name it can prevent the right parameter from being keyed. [at]ue-sequencer

• Re-added logic to handle Pasted Actors when pasting bindings.

• Fix to ensure that control rig shape actor is parented to the root component of the actor it is driving. This prevents circular dependencies for actors that don't have the root component as the default attachment component when a control rig is then attached to them.

• Movie Scene: Fixed issue where zero-scaled components would get their render state dirty called every time UE::MovieScene::SetComponentTransform is called.

• Fix for when an animation instance is a post process anim instance that is being evaluated we would fail to verify if it has changed because we don't check that it is post process. This marks the sequence as dirty and triggers the spawning phase to happen every frame. Now we validate against post process animbps as well.

• UAF Root Motion Extraction fix Move the same checks we do in the old code regarding 'Force Lock Root Bone' to allow root motion to still be extracted.

• Fix various issues where the normalized view did not always draw its curves correctly.

• Fixed visibility system to define implicit prerequisites only for the CDO. Additionally FSystemDependencyGraph::MakeRelationship only increments serial number if an edge was truly added to safeguard against situations where MakeRelationship gets called for the global dependency graph outside CDOs.

• Fix an issue where some curve types failed to draw the curve line before the first visible key correctly.

• Cine Camera: The Sensor Aspect Ratio is no longer animatable since its value is derived from Sensor Width and Height.

Skeletal Editing

New:

• Skeletal Mesh Editor

  • Explicit Asset Save action also applies pending changes to the asset before saving to disk.

  • Ported Bake Vertex Color tool from Modeling Mode.

  • Changing from one tool to another no longer requires pressing the accept button, multiple tool changes are cached and bulk committed only when users explicitly press apply changes to asset.

  • Added various menu options in the Morph Target Viewer to edit and manage morph targets, including mirror/flip/merge/apply current weight and several others.

  • Added geometry selection support for Morph Target editing, which allows for vertex level transform, soft selection and geometry isolation.

  • Added support for bone weight locking to Edit Skin Weights Tool.

  • The Skeletal Mesh Editor now shows a linear color ramp instead of an array of colors.

  • The Skeletal Mesh Editor now has a dedicated menu in the asset editor viewport toolbar.

• Skeletal Mesh Morph Target Editing Tools

  • Added Mask Morph Target Tool, which applies a custom mask to the editing morph target.

  • Improved Move brush in Sculpt Morph Target tool such that it is non-accumulating and easier to control.

• Improve copy-pasting and duplicating bones.

  • Add new options to Paste Local and Paste Global.

  • Pasting bones now retains the hierarchy of pasted bones.

  • Pasting bones now pastes copied bones and their children.

  • Duplicate now retains the hierarchy of duplicated bones.

• Added Dataflow based workflow to reimport a skeletal mesh from mesh and preserving all existing attribute and morph targets.

• Added a Dataflow Template for Skeletal mesh that takes a static mesh, split it by its mesh islands and convert it to a skeletal mesh where each mesh island is rigidly skinned to a separate bone.

• Skeletal Mesh Modeling Tool: Added "Import Bones from Assigned Skeleton" menu option to Edit Skeleton Tool.

• Added two Dataflow templates for skeletal meshes : Skeletonizer and Subdivision.

• New hotkey Alt-B to toggle draw bones.

• Add Dataflow support for Skeletal mesh asset.

• Skeletal Mesh Modeling Tools: Added support for cotan edge weighting in Edit Skin Weights tool.

• Skeletal Mesh Editor and Modeling Mode: A new version of the paint maps tool is enabled by default, to revert to the old version, use cvar "ModelingTools.UseExperimentalMeshAttributePaintTool 0" and re-enter the editor mode.

• Ctrl-clicking the selection mode buttons in the skin weight tool now converts selection from one mode to another.

• Mirroring now replaces strings from the right, finds strings anywhere in the name and supports regular expressions.

• Added a Clear() method to USkeletalMesh, to help prepare a USkeletalMesh for re-use w/ entirely new mesh/skeleton/etc data.

• Added Blueprint functions to selectively remove morph targets and skin weight profiles from a skeletal mesh.

• Orient bones now orients bones with multiple children in parent orientation.

• Switching between the isolated and the full mesh no longer clears the selection when editing weights.

• Selecting in the list of weighted Bones in the Weight Tool now selects the Bone in the Skeleton Tree.

• Improve selecting affected vertices of a Bone when Shift- or Ctrl-clicking the Affected button when editing Weights.

  • Fix Shift- and Ctrl-clicking Affected sometimes had no effect.

  • Ctrl-clicking Affected now toggles the selection of the affected vertices of a bone.

• Mirror and Orient no longer show an obsolete none axis option.

Bug Fix:

• Skeletal Mesh Modeling Tools

  • Add accumulation support for Relax brush in Edit Skin Weights tool and Paint Maps tool.

  • Fixed data loss when making skin weight edits to vertices holding 12 bone influences.

• Clear stale thumbnail scenes on asset reload.

• Avoid crashing when skeletal mesh reference skeleton changes by invalidating mesh linkup cache.

• Skeletal Mesh Editor: Fixed add support for previewing morph target curves in addition to bone pose in skeletal mesh editor when using the "Running Instance" preview controller in preview scene settings.

• Fix a crash where transient meshes with no mesh description are opened.

• Skeleton tree views now retain their selection and expansion state after edits.

• Bones are now mirrored in global space instead of the first parent's space.

• Collapsing nodes in the skeleton tree no longer deselects children of the collapsed node.

• Fix an issue where the wrong bone was renamed when a name was committed by changing the selection and losing focus.

Audio

New:

• Waveform Editor

  • Playhead refactor to use frame positions to allow better precision, along with handling offscreen playhead positions. Playhead is not rendered when offscreen.

  • Snap to zero crossing shortcut Integrated from 39.00.

• Sequencer

  • Update audio sections to not auto expand to keyframes.

  • Control bus mix track.

  • Audio control bus track.

• Adding db and Decibels to DefaultEngine.ini so it's possible to use UProperty markup for Units.

• Unclamping the "VolumeBase" metasound input for both oneshot and looping metasounds exposed to UEFN.

  • Tooltip reads as "[-60, 12] - Base volume applied to the sound, in decibels. The default value of [0] results in no volume change. A value of [-60] results in silence. [12] is the maximum gain we can apply."

  • VolumeBase default input range now reflects the new clamp range.

  • The clamped range is now [-60, 12] to match the clamp of audio devices. Previously was [-60,0] Updated tooltip to reflect this change in clamp.

• Unified property UX across Attenuation, AudioBus Sends, and Submix Sends.

• Submixes are now ref-counted when using the register/unregister API. When no longer referenced, submixes will be removed from the root. This can be disabled by setting au.RemoveSubmixesFromRoot to 0.

• Movie Render Queue: Expand ability to choose submix to export.

• Added option in CommonButtonGroupBase to suppress button sounds when calling SelectNextButton or SelectPreviousButton.

• Subtitles: Enable resizing of subtitle sections in sequencer.

• Unified property UX across USoundBase/USoundWave/USoundCue/UMetaSoundSource.

Bug Fix:

• Animation Editor

  • Animation Editor and Level Editor Viewports now call UpdateAudioListener when they receive focus and when the perspective camera moves. The Animation Editor has an additional call when we focus on the preview mesh. This fixes the requirement to move the camera in the viewport editor before the audio listener position updates.

  • Animation Editor windows request a new Audio Device so that we don't share the same Audio Device with Level Viewports.

• Sequencer

  • Fix for input channels not resetting when a metasound is changed.

  • Fix MRQ non realtime render to render silence instead of disabling.

  • Fixed sequencer audio channel inputs updating when modifying a metasound asset.

• Disabling Hardware Convolution Reverb on PS5.

• Add CQTest coverage for SoundFieldRendering encode/decode/rotation.

  • New SoundFieldDecoderTests.cpp with 22 test methods across 6 test classes.

  • Tests FAmbisonicsSoundfieldBuffer (construction, reset, duplicate).

  • Tests FAmbisonicsSoundfieldSettings (unique ID, duplicate).

  • Tests FSoundFieldDecoder with both omnidirectional and directional FOA inputs.

  • Tests directional decode correctness: Verifies spatial energy distribution matches source azimuth for stereo and quad speaker layouts.

  • Tests FOA rotation: Energy preservation, W-channel invariance, Y/X channel shifting under yaw rotation, and decoded balance shift after bed rotation.

  • Tests FSoundFieldEncoder channel counts (FOA/2nd order) and directional content.

  • Tests encode/decode roundtrip: Energy preservation, directional bias retention, and silence passthrough.

  • Tests public API: Format name and default settings.

  • Updated AudioCQTests.Build.cs to add SoundFieldRendering and AudioExtensions module dependencies.

• Waveform Editor

  • Fix for waveform editor playhead snapping to proper trim start or end bounds when editing

  • Fix playhead snapping when editing trims to snap to appropriate trim start or end bounds.

  • Fixed an issue in the Waveform Editor where wave files containing a partial final sample block were loaded with invalid trailing bytes, causing corrupted playback. The invalid bytes are now silently truncated at load time — the raw asset data is not modified.

• Fix for MRQ to render silence when there is no audio to allow timing of sequences to line up

Architecture

New:

• Change SubmixEffectReverb default Gain from 0.0 to 1.0 for new assets.

• Adding optional Low pass and High pass filters to submix and audio bus sends.

Bug Fix:

• Fixed issue where SoundBase→bEnableSubmixSends being false would ignore attenuation submix sends.

• Crossfade dry signal against submix effect chain overrides when no base chain absorbs the gap.

• Fix FDelay incorrect output for sub-1-sample delays.

• Fix potential thread-safety races in vorbis DLL init and AudioFormatOgg singleton.

Deprecated:

• FSoundWaveProxy now acts as a broker for FSoundWaveData so consumers can optionally update to latest data (i.e. post asset re-import). This requires the deprecation of FSoundWaveProxy that was just forwarding calls to the FSoundWaveData.

MetaSounds

New:

• Adds the experimental MetaSound Channel Agnostic Types (CAT) Wave Player node and its supporting types under the MetasoundExperimental plugin.

  • Engine runtime

    • UCatSoundWaveContainer + FCatSoundWaveContainerEntry: a UObject container of weighted USoundWave entries, edit-time UI for designers.

    • FCatSoundWaveContainerProxy / FCatSoundWaveContainerData: audio- thread proxy snapshot of the container, doubles as Audio::ISoundWaveContainer.

    • Audio::TCatProxyView: lock-free linked-list base for the proxy, supports mid-render hot-swap of container state from the game thread to the audio render thread.

    • MetasoundCatExperimental::FSoundWaveContainerAsset: MetaSound data- type wrapper held by value on the audio thread; namespace-scoped to avoid collision with the Polyphony plugin's same-named asset type.

    • MetasoundCatWavePlayerNode: polyphonic Audio Wave Player. Outputs a polymorphic CAT audio reference resolved at bind time per the Format / Auto / SourceAuto chooser. Configurable max voices, Index / Sequence playback types, Standard / Random playback modes. Sequence mode supports start index, finite/infinite loops, and reset trigger plus per-stage trigger outputs. Random mode supports weighted selection, deterministic seed, and an avoid-recent-N window. Pitch shift via plain float input pin.

  • Editor

    • AssetDefinition_CatSoundWaveContainer + factory: New-asset and "Create Sound Wave Container" content-browser context menu on SoundWave selections.

    • Editor module wires the MetaSound graph-pin factory registration for the new data type. MetaSound Engine / Frontend prerequisite edits.

    • UMetaSoundSource::CalculateAutoSourceFormat: rewrite to walk RuntimeInputData parameters with InParams overrides and pick the greatest channel count among Object / ObjectArray inputs. Adds a checkf guard requiring RuntimeInputData to be cached before the call. Intentional behavior change in scope of this change.

    • MetasoundFrontendSourceInterface: removed the unused AudioMixerNumChannels extern. The API never shipped, so no deprecation shim is required.

• Retain MetaSound input values on presets when parent graph inputs are renamed.

• Make MetaSound preset reset to default use inherited parent values.

• Improvements to the MetaSound node update transform API for C++ node developers New biquad node bandwidth default value for new nodes to avoid DSP edge cases.

• MetaSound DynamicInterfaceNodeConfiguration: Built-in node configuration for sub-interfaces and variants.

  • Add FMetaSoundDynamicInterfaceNodeConfiguration, a generic FMetaSoundFrontendNodeConfiguration that automatically handles sub-interface instance counts and variant type selection based on a node's FClassInterface definition. This eliminates the need for custom per-node configuration structs for nodes that use sub-interfaces or variants.

  • Changes:

    • Add MetasoundDynamicInterfaceNodeConfiguration (Frontend) - core configuration struct that reads FSubInterfaceDescription and variant descriptions from the FClassInterface to drive the node's interface override.

    • Add MetasoundDynamicInterfaceNodeConfigurationCustomization (Editor) - details panel customization providing variant type dropdowns and sub-interface count controls.

    • Update MetasoundExampleWeightedSumNode to use the built-in base configuration, removing the custom FMetaSoundExperimentalExampleWeightedSumNodeConfiguration workaround.

    • Update node registration macros and graph builder for dynamic interface configuration integration.

    • Add engine tests for configuration logic and UI customization.

• Added MetaSound Input Browser for bulk viewing and editing of MetaSound input values.

• MetaSounds that are sent a StartTime input parameter but do not implement the UE.Source.StartTime interface will now only warn once instead of on every play.

• Native MetaSound nodes can define a custom icon and color.

• Enable relative render cost by default Add cvar for logging a sound's relative render cost exceeding a threshold.

• Add MetaSound asset action for fixing up duplicate class name issues.

• Improved MetaSound builder Blueprint API and editor builder listener support for pages.

• Added various options for easy node creation when dragging assets into the MetaSound editor.

Bug Fix:

• Fix MetaSound input widget settings getting overridden when set to a type other than editor preference default.

• Fix crash when au.MetaSound.Experimental.OperatorPool.SetMaxNumOperators is set via Console Variables: In *.ini.

  • The cvar was registered as an FAutoConsoleCommand, but Console Variables: ini parsing creates placeholder IConsoleVariables for any name it encounters. When the MetasoundGenerator plugin later registered the command with the same name, FConsoleManager::AddConsoleObject hit a fatal log: 'Console object named... can'\''t be replaced with the new one of different type!'

  • Convert the registration to a TAutoConsoleVariable, default -1 (leave the pool default unchanged). An OnChanged callback forwards the value into the operator pool. StartupModule applies the current cvar value once the pool exists, so values set from the ini before the module loads still take effect.

• Fix AD Envelope attack phase skipped when Attack Time driven by Value (Float) node with Init Value of 0.

• Fix AB/BA potential deadlock between FOperatorPool::CriticalSection and OnAudioDeviceDestroyed.

• Make trigger repeat node high precision so it doesn't drift compared to Quartz / DAWs.

• Fix MetaSound preset input nodes not respecting sort order.

• Fix crash when setting a MetaSound constructor input or output to an unsupported type (ex. Trigger).

• Fix editor display issues when renaming MetaSound inputs or outputs.

• Fix ensure when reloading MetaSound externally added and referenced by another asset.

• Fix MetaSound patch details panel showing blank output format row.

Sequencer

New:

• Audio Sequencer

  • Added a "Play Until Finished" option to Audio Sections in Sequencer. When enabled, the section's evaluation range extends past its visual end to the sound's natural duration, keeping volume and pitch keyframes, pause, and state-restore cleanup active throughout the tail. Enable it with the CVar Sequencer.Audio.UsePlayUntilFinished (defaults to off).

    • Note: Trimming or resizing a section to a shorter length automatically disables the option, SoundCues that contain Random or Branch nodes are not supported, and MetaSounds extend to the sequence's playback-range end and stop via their OnFinished callback.

  • Added a bRepeating property to UMovieSceneAudioSection to replace the semantically overloaded bLooping property. The new property accurately describes Sequencer behavior by restarting a one-shot sound at the section boundary when the section is longer than the sound, reserving the term “looping” for natively looping audio assets. The transition is controlled by the Sequencer.Audio.UseRepeating CVar (enabled by default), and existing assets are migrated automatically on load.

  • Fixed a bug where loop-divider lines in the Sequencer timeline stayed at their original screen positions instead of moving with the audio section when it was dragged.

  • Fixed an issue where audio sections defaulted to looping when added to a sequence, regardless of the source sound asset's loop setting. Audio sections now initialize their loop state from the source asset.

• Batch editing and highlighting for stale actors in audio sections when right clicking on track to batch edit, or multi selecting audio sections. Enable highlighting with cvar au.OutlineAudioActorAttachments.

Bug Fix:

• Fixed a bug where audio sections with a number of float parameter inputs that was an exact multiple of 9 silently dropped all float input data at runtime. Affected sections appeared to play correctly but none of their float parameter automation took effect.

Subtitles

New:

• Waves with Subtitles attached as UserData will now automatically play and stop their subtitles when the Waves are played from inside another Wave, such as a MetaSound or SoundCue.

• When scrubbing through a Sequence with subtitles, the subtitles will now display in the editor viewport.

• Sequencer Subtitle sections initialized with a blank subtitle are now given a default duration of 3 seconds.

• The Subtitles plugin will now warn if you try to replace the UMG widget with an invalid or missing asset.

• Added an optional Border UI element to subtitle UMG widgets' TextBlocks.

• SRT/SubripText files can now be used for bulk Subtitle import. A freshly-imported SRT file will create a Basic Overlay asset, which can be right-clicked to select Convert Basic Overlays To Subtitles.

Bug Fix:

• When loading a Subtitle asset in the editor, it will now enable/disable editing its Duration parameters based on its DurationType.

WaveForm

New:

• Waveform Editor

  • Changing the Fade handle icons and making the colors more colorblind friendly.

  • Decoupled fade in and fade out from the trim transformation. Fade behavior is now controlled by a standalone UWaveformTransformationFade sub-object on UWaveformTransformationTrimFade, making fades configurable independently of trimming in the Waveform Editor.

Bug Fix:

• Waveform Editor

  • Fixed an issue where pressing Shift+Space to return the playhead to the start of a waveform did not reset the playback start position, causing the next playback to begin from a stale offset instead of the beginning of the active region.

  • Fix crash when deleting an open SoundWave asset with the editor open/minimized. Guard USoundWave modification in ~FWaveformEditor() when the editor is closed due to asset deletion.

  • Sound Wave: Fixed an issue where opening a Sound Wave asset in the Waveform Editor while the asset was playing in the editor stopped playback. Transformation edits now take a targeted path in USoundWave::PostEditChangeProperty() that rebuilds compressed data without freeing audio resources for in-flight sounds.

  • U Sound Wave: Adding LUFs and PeakLoudness to metadata in the content browser. When the Waveform Editor is enabled, audio analysis is triggered in 3 spots:

    • On asset import/reimport (per asset).

    • When opening an asset in the Waveform Editor (per asset).

    • Using the ResaveSoundWaveLoudness commandlet.

Editor

New:

• PCG

  • Moved UPCGManagedResource management out of UPCGComponent and into FPCGManagedResourceContainer.

    • Reduces code duplication for new execution source types.

  • PCG Builder Volume.

    • Editor only actor used to limit the bounds of generation when using the PCG Builder commandlet.

  • Blueprint : Point loop functions can require game thread execution (single threaded).

    • This will cause errors if the Blueprint element itself is not 'bRequiresGameThread'

  • PCGGraphExecutionRegistry

    • Now possible to register execution source providers through a common registry.

    • Use this registry to gather execution sources to display in Graph debugger.

    • Implement a default provider for UPCGComponent and UPCGDefaultExecutionSource.

  • More work to move from UPCGComponent to IPCGGraphExecutionSource.

    • FPCGActorComponentMapping renamed to FPCGTrackingManager.

    • Move most of the API to IPCGGraphExecutionSource except for partitioning.

    • IPCGGraphExecutionState already supports partitioning in its interface but actual implementation is still very much APartitionActor dependant (needs to be abstracted away).

    • Some of the partitioning API was moved to IPCGGraphExecutionSource but implementers should not expect functional tracking for anything other than PCGComponents.

• Added a batch processor framework for running functions on large datasets - typically of assets.

  • Results will be written to Saved/MultiprocessResults/results.txt, the location of results can be overridden with the `-resultsfile=` option. -numworkers= can be used to control the number of workers used to process the batch.

  • The Batch Process facilitates parallelism which is useful when invoking a function a large number of times (e.g. tens of thousands or millions). Batch jobs can also be started from script using `BatchProcessLibrary::RunBatch`.

  • Here's a complete example in python - note the final steps regarding registration ceremony:

    Python

    # Save in /Game/Content/Python/snapshot_assets.py import json import os import unreal # Declare a uclass with a function that we want to run, this simple function just # takes an asset path, loads it, stringifies it, and writes the string to a file: @unreal.uclass() class SnapshotAsset(unreal.Object): @unreal.ufunction(params=[str]) def snapshot_asset(self, asset_path: str) → None: # Load the asset: asset = unreal.load_asset(asset_path) if asset is None: unreal.log_error(f"FAIL: {asset_path} (asset not found)") return json_str = unreal.JsonObjectGraphFunctionLibrary.stringify([asset.get_package()], unreal.JsonStringifyOptions(unreal.JsonStringifyFlags.FILTER_EDITOR_ONLY_DATA)) # Build a nested output path from the package path, stripping the leading '/'. # e.g. "/Game/Baz/Foo" → "Game/Baz/Foo.json" and write to that file: relative = asset_path.lstrip("/") out_path = os.path.join(unreal.Paths.project_saved_dir(), "SnapshotAsset", f"{relative}.json") os.makedirs(os.path.dirname(out_path), exist_ok=True) # Write out the stringified asset: with open(out_path, "w", encoding="utf-8") as f: f.write(json_str) unreal.log(f"PASS: {asset_path} → {out_path}") # Discover all assets of the specified type, run snapshot_asset def _run_snapshot(asset_class: str)→ None: registry = unreal.AssetRegistryHelpers.get_asset_registry() registry.wait_for_completion() asset_filter = unreal.ARFilter(class_names=[asset_class], recursive_paths=True, recursive_classes=True) asset_paths = [str(a.package_name) for a in registry.get_assets(asset_filter)] # Build the job description. job = { "function": "/Game/Python/snapshot_assets_PY.SnapshotAsset:snapshot_asset", "arguments": [{"asset_path": p} for p in asset_paths], } # Run the batch — blocks until all jobs complete. results_json = unreal.BatchProcessLibrary.run_batch(json.dumps(job), num_workers=8) results = json.loads(results_json) passed = [r for r in results if r["Passed"]] failed = [r for r in results if not r["Passed"]] print(f"{len(passed)}/{len(results)} passed") for r in failed: print(f" FAIL: {r['ArgumentSummary']}\n {r['Output']}") def run_blueprints_snapshot() → None: _run_snapshot("Blueprint") if __name__ == '__main__': # critical, prevents forkbomb if init_unreal is used to import this script run_blueprints_snapshot()

    Copy full snippet(1 line long)

  • The final step is to register the SnapshotAsset class with Unreal Engine. Typically this is done by adding `import snapshot_assets` to your project's init_unreal.py. Once that is complete you can run the script like any other python script:

    Command Line

    UnrealEditor.exe "D:\Path\To\Your\ProjectName.uproject" -run=pythonscript -script="D:\Path\To\Your\Project\Content\Python\snapshot_assets.py"

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  • To launch a batch job from the command line use: `UnrealEditor ProjectName -run=BatchProcessCommandlet D:\Path\To\Jobs.json` where Jobs.json describes a function and list of arguments to invoke said function with, e.g.:

    Shell

    { "function": "/Script/Engine.KismetSystemLibrary:PrintString", "arguments": [ { "InString": "Hello World", "bPrintToLog": true }, { "InString": "Hello World2", "bPrintToLog": true } ] }

    Copy full snippet(1 line long)

• Added reset to default support for root properties of Editor Preferences, Project Settings, Keyboard shortcuts.

  • Added default value in the tooltip of the property/keybind name.

  • Added CVAR to refresh cached default values : SettingsEditor.ClearObjectDefaultPropertyValuesCache.

  • Limitations are the following:

  • It will not work for properties that are missing the Config specifier.

  • It will not work for custom added rows obviously.

  • It will not work for settings object with a customization since it overrides the default one.

  • It will not work on nested properties, only the root properties of a settings object are supported for performance to avoid having to parse the default stringify value recursively.

• Added ability to search for CVAR, KEYBIND, CONTEXT in Editor, Project, Input Settings.

  • Added keybind button to start listening for key presses and search for these input chords.

  • Simplifying editor settings keybind list by removing description based on command tooltip, description is available in the tooltip now.

• Added behavior selection for tabs navigation action in Editor Settings / Misc, before this change editor only navigates between assets and uses last access time to determine order, now browser style tab navigation is available, it uses window tab order (default is browser style behavior) CTRL+Tab goes forward, CTRL+SHIFT+Tab goes backward.

  • Added an option to hide tab navigation popup dialog widget and directly perform the action (default is showing this dialog).

  • Before this change navigation only worked on asset tabs, you can now navigate between any tabs (editor settings, project settings, logs...).

  • Reduced size of items in tab navigation dialog widget.

  • Fixed Scrollbar not working and Listview not scrolling into view.

• Added UnrealAssetStringify: A standalone program to quickly print a.uasset or.umap to json. Use Engine\Source\Programs\UnrealAssetStringify\BuildScripts\UnrealAssetStringifyInstall.bat to build the tool and optionally associate it with the asset diff command in p4v. Once built the tool can be found at Engine\Binaries\${PLATFORM}\UnrealAssetStringify[.exe] Example usage:

  • `UnrealAssetStringify.exe "D:\Path\To\A.uasset"`: Prints the asset to stdout.

  • `UnrealAssetStringify.exe --save "D:\Path\To\A.uasset"`: Writes the json to Engine\Programs\UnrealAssetStringify\Saved

  • `UnrealAssetStringify.exe --save="D:\Output\A.json" "D:\Path\To\A.uasset"`: Writes the json to "D:\Output\A.json" instead of the default save location.

  • To open a.uasset for viewing in vs code use Engine\Source\Programs\UnrealAssetStringify\Scripts\UnrealAssetStringifyOpenAsset.bat.

  • To manually diff uassets using p4v use Engine\Source\Programs\UnrealAssetStringify\Scripts\UnrealAssetStringifyP4VDiff.py.

    • UnrealAssetStringify is a read-only tool that is useful for reviewing asset changes, post mortem analysis, and asset content indexing; it cannot be used to update uassets.

• Added copy all info to clipboard in project badge context menu.

• Improved material editor preview mesh material slot picker to persist user choice in config, default is material slot 0 active.

• Migrated some common reference validation logic to UAssetReferencingPolicySubsystem::ValidateAssetReferences It now supports:

  • Denoting whether a missing reference is actually missing or only unsaved.

  • Optionally also validating references to C++ modules in plugins (when 'AssetReferencingPolicy.CheckForIllegalCppRefs' is enabled).

  • Ignoring missing references from a redirector, as they may redirect to unloaded plugins.

• Promoted "Slate.bAllowThrottling" to Editor Preferences, which allows real-time property edits when disabled.

• Make the "open source code" action async, so that the editor doesn't lock up every time you press it and wait for your IDE to open.

• Downgraded error handling when a console variable was not found from fatal to error in DeveloperSettings::ImportConsoleVariableValues.

• Added new grid floor material to newly created profile and engine profile as long as they don't have the floor material overridden.

• Change the IOS preview options in order to mirror Android preview.

• Added command with keyboard shortcut to Capture Thumbnail for asset in the Content Browser (CTRL+SHIFT+T).

• Rename ToggleFeatureLevelPreview to TogglePreviewPlatform Rename IsFeatureLevelPreviewEnabled to IsPreviewPlatformEnabled Rename IsFeatureLevelPreviewActive to IsPreviewPlatformActive.

• Merged ToggleFeatureLevelPreview into SetPreviewPlatform using a new bCompileShaders parameter that controls whether or not we compile the shaders.

  • Added bRestore parameter to device profile update to skip redundant RestorePreviewDeviceProfile during toggle.

  • Removed CachedEditorShaderPlatform member, using GMaxRHIShaderPlatform directly.

  • Removed toggle button restriction for GMaxRHIFeatureLevel.

• Added in-editor validation for missing hard-refs This is disabled by default, but can be enabled by setting the CVar 'AssetReferencingPolicy.CheckForMissingHardRefs' to true.

• Editor Preview Platform Optimizations Materials are already updated by SetPreviewPlatform, so disable the automatic per-texture material dependency update 8min →1min Preview transition.

• Improved support for incremental validation in incremental cooks.

  • Incremental cooks already mostly handle incremental validation, as they skip loading the package if it hasn't changed (as validation runs via UCookOnTheFlyServer::LoadPackageInQueue), however changes to a world would still validate all their external objects. This can be quite slow for large worlds.

  • This change improves the incremental validation support so that it only validates the specific external objects that have changed in a world being re-cooked. It does this by comparing the hash of each external actor object against the previous version that was validated, and skipping any that haven't changed.

  • This feature is disabled by default, but can be enabled by setting the CVar 'cook.validation.IncrementalExternalPackageValidationEnabled' to true.

  • Note: It only currently works for single-process by-the-book cooks. You can also now trigger a full revalidation when running incremental validation against a new build version, by setting the CVar 'cook.validation.IncrementalValidationRequiresSameBuildVersion' to true. This is disabled by default.

• Added ConfigureCookSession event, to allow registering extra artifacts and collectors to be used by the cooker.

• Fixed level editor PlayFromHere action not working with keybinds (set to ALT+SHIFT+P).

  • Improved API to play from here based on click, selected actor or custom position.

  • Play mode (Floating window or in viewport) will be based on the selected user choice in Play Settings.

  • Play from here will first check selected actor (must set bCanPlayFromHere to true) then fallback to viewport last clicked location.

• Selection: Typed Element Common actions now supports a CanDuplicate so asset editors can customize if they allow for duplicating of the selection.

• Add support for capturing expansion state per custom built details view via ViewIdentifier's.

  • Initial usage example in SStateCentricViewMainStateNode.cpp.

• Scene viewports can now compute correct mouse positions in cases where the underlying scene render is a different resolution from the Slate output of the viewport.

• Make "new-process" PIE work like "Preview Platform"

  • Mobile "new-process" PIE now respects the Preview Platform set, the Device Profile and the Aspect ratio(flipped, unflipped) of the main editor viewport.

• Add Aspect Ratio to IOS Preview Json.

• Revision Control: Revision control helpers get status functions can now use the cached file state. This can be useful after operations that already update file state (i.e. saving files).

• Minor Improvement of Log Categories performance in the OutputLog.

• Add Preview json Versioning.

• Add Flip Aspect Ratio for Preview Json.

• Add ConfigRules to Android Preview Json Clean-up unnecessary usage of FName in AndroidDeviceSelector.

• Preview Json Improvements.

  • Added IosPreviewDeviceProfileSelectorModule in order to enable Generate/Preview Json on IOS.

  • The DeviceSelectors will now return the PreviewPlatform from the DeviceProfile selected and the device properties.

  • Modified the way the Preview Json preview platform label name is shown. It now displays Preview Platform Name + Device Profile, instead of just Device profile.

  • Confirmation Dialog added when Generating Platform Json.

• Add Editor Settings to configure default name with prefix and suffix for new assets.

• Added shaderball as a mesh preview in the material editor.

  • Save the last used preview mesh in config to load it again on material and material instance editor opening.

  • Materials will use their own preview mesh property if set, otherwise fallback on the last used editor preview mesh, when the last used preview mesh can't be loaded, falling back to the sphere mesh.

• Added keybind to toggle the grid in Asset Editor (ALT+SHIFT+G since ALT+G is used for perspective view and G is used for GameView).

• Add Control + Shift + Z as an alternate InputChord for Redo.

• Cook-time validation improvements.

  • Pre-load external objects prior to running validators. This is controlled by the CVar 'DataValidation.LoadExternalObjectsForCookValidation' and is enabled by default to match the default editor behavior.

  • Added support for reporting the total validation duration per-validator for cook-time validation. This is controlled by the CVar 'DataValidation.ReportCookValidationStats' and is enabled by default.

• TextureFormatOodle is now a built-in Engine Module instead of a Plugin. It is used for texture encoding by default, regardless of config, even in no-Plugin minimal configurations. The only NVTT and ISPC fallback codecs are now deprecated.

• DataTable export struct to string and file as objects.

• Added more level of precision to editor spinboxes.

  • Shift = Deca (+10/-10)

  • Ctrl = Deci (+0.1/-0.1)

  • Shift + Alt = Hecto (+100/-100)

  • Ctrl + Alt = Centi (+0.01/-0.01)

• Added editor project badge context menu with the ability to copy info to clipboard (project name, version, changelist, branch, build configuration, build date, RHI).

  • Added double click to project badge will copy changelist to clipboard (for QA).

• Added Keyboard Shortcut menu entry in Edit menu.

  • Added Keybinds to access Editor, Project, Keyboard preferences directly.

• Extend "Browse to Asset" capability for Editor Utility Widget.

  • Allow tab context menu actions without activating the tab (web browser style).

• Display ticked objects in ActorPalette viewport, when realtime toggle is enabled.

• Data Validation: The Data Validation Commandlet has been refactored to make custom behaviors via a child class implementation easier to do.

• Add GetPreviewPlatformName Blueprint function.

• Improved ortho view grid density logic when in a mode where view background is irrelevant.

• Data Registry: Fixed "Find Row References" to view references with type FDataRegistryId::StaticStruct() using the name from FDataRegistryId.ToString().

• Add support for filtering shown categories when creating a details view. Add support for hiding headers when creating a details view.

• Added Filter by Selection capability in Content Browser and AssetPicker with keybind ALT+F, it uses the active selection in the context to set filters.

• Added the ability to display specific RGBA color channels in the active editor viewports, as well as options to control how the alpha channel specifically is displayed. These options show up under the View Mode dropdown of the viewport toolbar.

• Added support for -RpcClientNum to handle multiple clients with unique ports, and they just increment after the "client" port in the.ini, when using -RpcConfig=foo.

  • Added support for multiple listening ports for Rpcs.

• Improved BP Editor's menu filtering with additional context options for show flags and view modes and camera settings.

  • Fixed cannot set camera clipping settings in the BP Editor's viewport.

  • Fixed cannot set other show flags in the BP Editor's viewport.

• Allow Abstract classes Tagged Asset Browser Filter Allow Tagged Asset Browser searching for NativeParentClass Allow Tagged Asset Browser searching for Skeleton.

Bug Fix:

• Property Editor

  • Fix struct array elements sharing expansion state after ForceRefresh.

  • Fix struct UPROPERTY rows losing expansion state across ForceRefresh.

• PCG

  • Fix UPCGPointArrayData::GetTransformCopy not respecting inheritance.

    • Revert collapse to use GetTransformCopy again now that it is fixed.

  • PIE: Load as preview fix for managed components.

• glTF Exporter

  • Supporting better primitive number calculations, supporting exports for meshes with unused Materials.

  • Out of bounds crash 'fix' for SourceModel export.

• Fix BroadcastBeginObjectMovement/BroadcastEndObjectMovement pairing on click-only gizmo interaction. GEditor→BroadcastBeginObjectMovement was fired unconditionally in GizmoManipulationStarted, but the matching BroadcastEndObjectMovement was gated behind an early-return that only fires for actual drags. Clicking a gizmo handle without dragging left any listener of OnBeginObjectMovement/OnEndObjectMovement with a permanently-stuck is-moving state until the editor restarted. This was breaking root motion being applied to actors in the anim mixer, causing them to stop responding to root motion until another drag of the gizmo is attempted.

• Scene Viewport: Fix issue when transitioning from the software cursor to the hardware cursor where clamping the cursor position: 1) incorrectly applied pixel scale resulting in incorrect positions; and 2) subsequent mouse movement updates caused a disconnect between the normal and unbounded cursor position.

• Fixed ability to copy a property without any reference = "None" to clipboard to be able to paste it later in a details view row.

  • Fixed show flash animation on copy/paste when using context menu with custom actions.

• Fixed blank project that fail to Quick Launch on Android devices with a Binary build.

• ITF: Fixed some editor input freezing during static mesh async builds. In detail: Moved InteractiveToolsContext invalidation propagation out of throttle-gated Tick into a separate hook called before the viewport tick gate, so input-driven invalidations reach bNeedsRedraw during async asset compilation.

• Fixed an issue that would wipe out instanced struct data when using JSON import and export of Data Tables.

• Change world leak check in the editor to ensure instead of crashing, this fixes issues when transferring maps in Play in Editor with certain editor windows open.

• Fix crash in Editor texture viewer due to preview platforms texture encodings when some platforms were not fully installed on the client system.

• ResavePackagesCommandlet now loads default editor modules, which gives them a chance to bind to UPackage::OnTransferMetadataRequested. If the callbacks aren't bound, data stored in FMetaData is thrown out upon resave.

• User Asset Tags: Fixed ResavePackagesCommandlet discarding User Asset Tags on resave due to UserAssetTagsEditor module not being loaded (metadata transfer wasn't bound).

• Fixed crash saving levels with high actor counts.

• Fixed content browser deleting folders with multiple assets contained in the same package would fail since there is a mismatch between assets count and loaded objects.

• Fixed Launcher process and thread leaks, and memory corruption.

• Fixed color picker would close and not transact any property change on any Blueprint classes, this is caused by the Blueprint rerun construction script and objects replacement happening in editor, the actor and its sub-objects are duplicated and replaced after a property change (value set), this would trigger a details panel refresh with the new objects and underlying property handle would change, old ones would be invalidated, and color picker would close immediately without processing transaction. This would not happen with C++ actor class since they are not getting replaced.

• Fixed Editor Preferences: General Appearance application scale not updated after an import.

• Fixed recursive call to FTargetPlatformManagerModule::ModulesChangesCallback during post Turnkey installation that causes a dead lock.

• Fixed external environment variable changes during turnkey.

• Skipped hit proxy invalidation when the user is controlling a viewport piloted camera, to minimize flush performance cost.

• Fixed pressing a keybind like DELETE in content browser when nothing is selected would still trigger the command for the outliner selection even if it does not have the focus.

  • Added option in editor preferences to hide/show quick jump text (red/blue text) in the bottom right of the content browser (hidden by default).

• Fixed tab location not saved and preserved for assets using workspace editor.

• Fixed General Appearance - Editor Preference : Import values are not saved.

• Modes - Gizmos: Update default mode manager implementation to use the asset editor default mode, and the level editor one uses the level editor default ed mode.

  • Removed swapping of modes - this wasn't having an effect on gizmo visibility in asset editors.

  • This fixes an issue where when legacy gizmos are toggled on globally, a selection must be active in the level editor for the gizmos to display in an asset editor that was using the default editor modes.

• Fix Preview crash caused by copying over Flags when Platforms Cvar copy.

• Give the RenderDoc, PixWin, and Xcode "CaptureFrame" toolbar entries each their own unique id.

• Fixed restore open asset tab location on restart (docked or undocked) after a crash.

• Fix Preview Platform in Editor could fail to show the textures with updated LOD settings for the chosen platform.

• Fix VT thumbnails could appear too bright due to SRGB flag mismatch.

• Fixed an issue where the Recently Executed Python Files menu included files that were run during editor startup.

• Fixed configuration import by removing irrelevant sections for keybinds to avoid same section+key clash on merge.

  • Fixed configuration export by allowing duplicated keys in a section when merging files, this was causing keybinds to be lost.

  • Added notification hyperlink to navigate to exported file.

• Selection: Fix a couple of crashes with ISM selection, and improve the traversal of actor, component, ISM with double clicks.

• Fixed crash caused by the NotifyToolsOfObjectReplacement event being triggered on garbage collected assets.

• Fixed ensure in CurveTableEditor when deleting a curve row.

• Fixed memory leak in content browser when removing collection.

• Fixed logging being delayed by 2 logs calling UAT with the Launcher.

• Fixed possible crash when trying to open a new map.

• Data Validation: Fixed an issue where the data validation fixers wouldn't always capture all the modified packages during the validation.

• Fixed Scene Outliner base selection is lost when ctrl is held and a new search is made to select additional elements in the scene outliner.

• Fix content browser favorites being lost when unmounting plugins.

• Geometry Mode: Fixed erroneous usage of StaticClass in ShutdownModule.

• Asset Rename Manager: Avoid reporting references from sub-objects of redirected path.

• Fixed hotkeys do not work in the Outliner when undocked.

• Fix crash when opening color picker during a hitch.

• No longer moves a viewport-locked actor when input is disabled in that viewport.

  • The "picture-in-picture" preview for camera actors could sometimes rotate that actor as if piloted. This was because the viewport's camera controller was clamping the pitch angle to -90;+90 degrees, so when that came into effect, the output pitch differed from the input pitch.

  • This in turn was picked up by the viewport's camera movement handling as a difference that needed to be reproduced on the locked actor, something that happens when piloting an actor using a movement mode that has inertia for smoother movements.

  • This change just disables that part of the code when input is itself disabled (which is the case in the PiP viewports), since it makes little sense to move a locked actor if the user doesn't have input to pilot it.

• Fix an issue on Mac where the traffic buttons showed up on the rename window.

Deprecated:

• Gizmos

  • Remove experimental gizmo option from level editor viewport. This was rehomed to gizmo settings and profiles.

  • Remove outdated and experimental light gizmo plugin. These are no longer good representations of how we build gizmos in the editor, and have outlived their experimental status. We'll re-evaluate their UX in the future. For now, they needed to be manually activated via the mode manager on the level editor, and required for external teams to make code changes in order to use it. If there was usage of this, it can always be restored from the github history in the meantime.

• Deprecate ChangeFeatureLevel/ChangePlatformLevel(ERHIFeatureLevel::Type) on UGroomBindingAsset and UGroomAsset, and HandlePlatformPreviewChanged/HandleFeatureLevelChanged(ERHIFeatureLevel::Type) on UGroomComponent.

  • Replace the two separate cached feature/platform level members into a single EShaderPlatform CachedResourceShaderPlatform.

  • Replace with ChangeShaderPlatform(EShaderPlatform) and HandlePlatformPreviewChanged(EShaderPlatform).

• Deprecate PIEPreviewDeviceProfileSelector Remove all dependencies to the PIEPreviewDeviceProfileSelector from the Engine.

• Deprecation: Remove deprecated AActor::EditorKeyPressed function.

Datasmith

Bug Fix:

• Fix for crash building morph targets with legacy FBX importer when UseT0AsRefPose is set.

• Fix crash when opening Dataprep Asset.

Framework

New:

• TEDS

  • Cooperative Task Refinement

    • Wait a fixed amount of frames (default: 5) when there is no more time left, if the editor doesn't recover use a minimal processing time (default: 2ms).

    • Added additional stats.

  • Added tab to debug tables to the TEDS Debugger.

  • Refactored Query Capability forwarding to use explicit context environments.

  • Added the ability to put the compatibility layer in immediate mode.

  • Added Query Stack nodes that trigger delegates when a change is detected.

  • Added support for dynamic columns to the new query context.

  • Deprecated `CurrentRowHasColumns` and `CurrentBatchTableHasColumns` in favor of `CurrentTableHasColumns`.

  • Added functionality to retrieve the unique tag that's added to a table.

  • Made the actor table derive from the more general UObject table.

  • Context Capability mocks now have an explicit `Assign_*` function and overloaded functions now work by overloading those `Assign_*` functions.

  • Added additional logging to track the state of TEDS Core and Compatibility (de)initialization.

  • Removed ClearRow in the command buffer for a performance gain.

  • Added a new mapping key type "KeyIssue" to report errors. [TEDS] The type of a mapping key can not be retrieved. [TEDS] "GetAs" was added to the mapping key to be able to retrieve the content.

  • Reintroduced the `TEDS.Enable` CVar.

  • Updated the STedsSearchBbox to support the new query search node.

  • Added 2 new nodes to the Query Stack for searching.

  • Added the ability to calculate a hash of the topology of a table. Changes whenever a row/column is added/removed.

  • Marked more columns to searchable and sortable.

  • Added a utility class to collect row handles concurrently from multiple threads.

  • Cooperative task refinement: Exclude its own runtime from calculating the available time next frame.

  • Allow dynamic columns to be declared at compile time.

  • Added `RegisterHierarchies` to the factories to allow hierarchies to be registered on initialization.

  • Simplified Perforce TEDS data interaction.

    • Skein Perforce TEDS data interaction.

• Replaced cvars by RevisionControlOverlaySettings to support the revision control overlay's options.

• ITF Behaviors: Apply the "input complexity is priority" convention to appropriate base ITF behaviors.

  • Moved the binding complexity priority step definitions to FInputCapturePriority.

  • Mapped and active modifiers automatically count towards a behavior's priority. This can be disabled with the "ITF.UseITFWideBindingComplexityPriority 0" CVar.

• Log a warning if an EditCondition involves a property that is marked deprecated.

• Add ability to indent TokenizedMessage(s) when shown in Message Log(s) to allow for semi-visual grouping.

Bug Fix:

• TEDS

  • Fixed incorrect pre-check before calling `AddCompositionToEntity_GetDelta`.

  • Fixed the result counter in FQueryResult not being atomic.

  • Fixed observers on occasion invalidating the list of pending UObjects in TEDS Compatibility. [TEDS] Fixed an off-by-one bug that could loose async loaded actors.

  • Fixed commands getting stuck in the command buffer.

  • Fixed RemoveColumns called from a query callback not being called on rows outside the active query context.

  • Fixed bug in BatchAddRemoveColumns where an assert could trigger if columns were added and removed in the same call.

  • Mapping performance significantly improved at large scale (100k+).

  • Explicitly flushing the command buffer internally when used in a direct API call to provide consistent behavior.

  • Fixed FNames sorted by the appended number instead of the internal ID.

• Moved SccStatusUpdateTags queries out of PerforceSourceControlProvider to RevisionControlProcessors. This ensures proper tag cleanup even when perforce is not used/connected.

• Fixed resave commandlet failing to find any asset when using the asset registry when the package has a path relative to the engine dir.

  • Added -ForceMaterialAutoUsageFlag command line option, to be used in conjunction with -onlymaterials, to force set the corresponding option on all processed materials.

Interchange

New:

• USD Interchange

  • USD Interchange imports will now respect the UseWorldSpaceNormals material parameter that is produced by landscape exports to USD.

  • USD Interchange error handling will now also collect, deduplicate and display USD SDK errors as Interchange errors.

  • Added support for importing Chaos ClothAssets via USD Interchange via dedicated schemas.

  • Added support for skeletal mesh collapsing on USD Interchange imports. It is now possible to individually collapse Mesh prim hierarchies inside SkelRoots as separate SkeletalMeshes, by using the prim kinds and/or collapsing schemas, controlling the USD Translator's collapsing settings, and the Generic Assets Pipeline options for combining skeletal meshes.

  • Removed the extra sprite added to every spawned scene component on USD Interchange level imports.

  • The option to bCombineStaticMeshes for USD Interchange asset imports has been hidden, as it could conflict with the new collapsing support.

  • Allow specifying custom render contexts for USD Interchange Schema Handlers intended for parsing material schemas.

  • Added support for spawning lights with Nits units on Interchange imports. Imports via USD Interchange will prefer the new Nits units when possible for direct correspondence with USD.

  • Added support for point and spot light source radius when importing via USD Interchange.

  • The USD Interchange import option for filtering imported geometry purposes has moved back to the USD Translator settings (it temporarily became a USD Pipeline option).

  • Interchange USD now supports prim collapsing, both via prim kinds and the dedicated collapsing schemas. The collapsing settings can be configured on the USD Translator settings (the three dots on the top right of the USD Interchange import options dialog).

  • Improved support for camera parameters when importing via USD Interchange, expanding support for clip planes, exposure method, exposure compensation value, and exposure FStop, ISO and shutter speed attributes.

  • Actors, components and assets imported via USD Interchange will only have their properties set to any value if the corresponding source USD attribute had an actually authored opinion. In other words, fallback USD values will no longer be converted into Unreal property values.

  • Refactored the USD Translator to use Schema Handlers: These are classes meant to each describe the translation of a particular USD schema. Users can implement, override, disable, enable and reorder schema handlers from project-level code and plugins, and e.g. implement translation of their custom USD schemas for USD Interchange.

  • Added support for directional light source angle when importing USD stages via USD Interchange.

  • The top-level actor spawned by USD Interchange level imports will no longer display the file extension of the imported layer as part of its display label.

• Added a GenericPayloadData class and an implementation of it on the USD Translator. This allows user code to describe brand new payload data, and to have schema handlers provide that data to user-provided Interchange factories.

• Imports and exports from/to USD may now cause point and spot light source radius values to be clamped to a minimum value, to ensure that the intensity values don't explode to infinity when converting to and from Nits to other light intensity units.

• Importing USD stages with light prims that contain "exposure" animations may now cause the intensity animation track to be baked frame by frame, as the intensity formula contains an exponential function that cannot be correctly interpolated with purely linear keyframes.

• Added a fallback for parsing light attributes from USD prims without the "inputs:" prefix, allowing for backwards compatibility with older scenes.

• Added support for exporting the Refraction channel when baking materials to USD. 1.0 will be used as the default for refraction when exporting translucent materials, to match the Unreal refraction value default.

• Fix missing assets and components on USD imports when the USD prim names differ only by letter casing (e.g. "/Cube" and "/CUBE" on the same stage).

• Added some feedback when the USD reimport fails due to the stage not having a valid prim at the same original prim path.

• Spawn all camera actors as movable when opening or importing USD stages.

• Fixed default refraction and displacement values on the USD preview surface reference materials to match the USD defaults of 1.5 and 0.0, respectively.

• Fixed how the USD Stage transform would not be baked into the OpenVDB texture when importing volume textures into SVT assets via USD imports.

• Interchange will now spawn all light actors with stationary mobility, following the behavior of the Place Actors window.

• Added support for exporting mesh component Overlay Materials to USD as referenced copies of the original mesh prims, but with different material assignments.

• Added support for Capsule_1 and Cylinder_1 primitive schemas when opening or importing USD Stages.

• The DomeLight_1 schema is now supported as the DomeLight schema when opening and importing USD Stages. When exporting to USD, SkyLights will be converted to the new DomeLight_1 schema.

• The USD Importer will now check that the provided reference materials configured on the USD project settings have the expected properties (e.g. the provided two-sided reference material must actually be two-sided).

• On the USD Stage Editor, it should now be possible to author references and payloads on prims that don't yet have a spec on the current USD edit target.

• Prevent the collapsing of prims with alternate draw modes when opening or importing USD stages.

• The Interchange inspector dialog now sorts nodes by name and type.

• Show an error toast when the Interchange import or reimport failed to produce any actor or asset.

• Clamp the subdivision level to a minimum and maximum on the Interchange USD import options dialog.

Bug Fix:

• Reset existing LODModels for reimport, so that Bone bindings and mappings are updated correctly. Also attempting to update SkeletalMeshEditor in case the re-import was triggered outside of the SkeletalMeshEditor.

• Fix a crash when importing some scenes via Interchange if some of the scene's assets fail to import and are canceled mid-import (such as textures failing to parse).

• glTF: Vulnerability fixes for glTF Reader.

• Fixed internal USD errors being uncaught and propagating to Unreal when triggering Async USD Interchange imports in some edge case scenarios.

• Fixed a crash when importing (via USD Interchange) stages with blend shape animation curves that happened to produce no valid curve data.

• Fix level sequence export to USD missing animated attributes of SpotLight components.

• Fixed how USD Interchange imports would produce duplicates of the same textures if the textures were used on different material inputs.

• Fix how the Interchange texture factory would delete existing texture assets when reimporting in some scenarios.

• Fixed how exporting levels to USD would not work with the traditional AssetExportTask Python snippet.

• Fix old assets still being referenced by the level and other assets after reimporting USD Stages in some scenarios.

• Fix texture assets imported via USD Interchange having names containing the source texture file extension.

• Fix static mesh actors imported for collision meshes via Interchange sometimes ending up with the render mesh assigned.

• Fix memory stomp on the stack in TiffImageWrapper. TIFFGetField expects a pointer to uint32 when using TIFFTAG_ROWSPERSTRIP but was passed a pointer to a uint16.

• Fixed Interchange showing the "There were issues with the import" toast when the recorded issues were due to previous imports.

• Fixed a crash when importing USD stages via Interchange and failing to find an existing material asset referenced by the stage via an Unreal Material prim.

• Fixed the handling of nested geometry purpose opinions when opening or importing USD Stages.

• Fix prim copy-paste behavior when selecting multiple prims at once on the USD Stage Editor.

• Prevent valid UTF8 characters from being unnecessarily sanitized away to underscores in some operations on the USD Stage Editor.

• Prevent loss of transform opinions in some edge cases when writing out attribute values to USD with a stage opened on the Stage Actor.

• Fix logic issue on the Interchange Inspector UI preventing the selection checkboxes from affecting the top-level nodes.

• Fix crashing when importing Geometry Cache assets from USD in some edge cases.

Scripting

New:

• Added a FindReferencesByTag function to the Gameplay Tags Toolset.

• Added a bOverwriteExisting option to CreateAsset, useful when automating/script object creation to not prompt.

• Added EBatchCreateFontAsset::CreateIfNoFontExists to help with automated importing not creating Foo_Font1, Foo_Font2 unncessarily.

• Exposed on option on UFontFileImportFactory to create a matching UFont for the UFontFace when programmatically/scripting importing a font.

• Added exposure to Level Editor Subsystem to Get and Set a level editor viewport camera's location, rotation and FOV Clamps FOV between 5 and 170 degrees, in line with the Editor UI spinner box UI.

• Require that SupportedClasses be filled out on UAssetActionUtility and UActorActionUtility Actions with no SupportedClasses filled out will now cause a data validation error.

• Added Optional property support to Python.

  • Python can now read and write Optional properties from UObjects and UStructs, where None is treated as unset.

    • Note: This does mean that you can't distinguish between an unset Optional and an Optional set to a null UObject, but the latter is an unusual use of Optional.

  • Python generated types can create Optional properties via a tuple of two values, where one is None and the other is the value type of the Optional (in either order),

    • E.g.:  ``` @unreal.uclass() class TestOptional(unreal.Object): prop = unreal.uproperty((str, None)) @unreal.ufunction(params=[(None, int)]) def func(self, opt): pass ```

• Exposed utils to import/export a string table from CSV to BP/Python.

• Scriptable Tools: Added MakeTransactional BP function to ScriptableInteractiveToolPropertySet so that tools can optionally enable transactions on a property set.

Bug Fix:

• Scriptable Tools:

  • Fixed ScriptableToolsFramework dependency on non-redistributable ToolWidgets module.

  • Refactored SDraggableBoxOverlay usage to isolate ToolWidgets as a dependency to ScriptableToolsEditorMode rather than ScriptableToolsFramework.

  • The coupling of ScriptableToolsFramework on ToolWidgets prevented runtimes from shipping the framework due to ToolWidgets non-redistributable status as part of the Source/Developer modules.

• Python-defined function return value fixes.

  • Fixed the order that packed return values are built, so they match the order that the types are defined (and match C++).

  • This was a bug previously fixed for the input arguments, but not the output arguments.

• Fixed crashes that could occur when reinstancing classes generated via Python.

• Fixed FPyWrapperSet::Intersection/IntersectionUpdate failing for builds where TSet was TCompactSet The updated implementation (iterating in reverse) works correctly for both TSparseSet and TCompactSet.

• Generate the TraceType/ObjectType ScriptName from the CollisionChannel DisplayName, if the CollisionChannel ScriptName is empty The old broken names are still available as deprecated aliases.

• Ensure the PythonScript commandlet enables source control prior to running the script Source control cannot be directly enabled in Python, so it's simpler to enable it from C++ before running the script.

UI

New:

• Tool Widgets

  • Deprecate SDraggableBoxOverlay.IsDraggable for Draggable to conform with established naming conventions. Deprecate SDraggableBoxOverlay.RestoreFromDragBoxPosition for SetDragBoxPosition to conform with established naming conventions.

  • Added resizing support to SDraggableBoxOverlay.

  • Make DragBoxPosition properties visible to details panel.

  • Added DragOverridesCenterAlignment to SDraggableBoxOverlay to allow dragging to override center alignment on either axis. This is useful for when we want a DraggableBoxOverlay to start centered but still allow users to customize its position.

• New experimental Semantic Search plugin: Changes content browser search to use a vector index-based search instead of the default keyword search.

• Teds Table Viewer Column: Support column metadata to disable sorting for a specific column.

• Added Gurmukhi to require full shaping.

• Hierarchy Editor: Multi-selection generalization for drag-drop and details panel.

  • Activated

  • Added option to turn off multi-selection via view model.

  • Disabled for Niagara (details customizations don't play nice).

  • Enabled for property bags (caveat: Only works well for same-type selections).

  • Drag initiates from tree view selection, not just the row under cursor.

  • All-or-nothing: If any element can't be dragged, entire drag refused with toast.

  • Hierarchy-aware: Parent+child selections skip child during drop (comes with parent).

  • Drop order always matches tree display order regardless of selection order.

  • Drag decorator shows "(+N)" for multi-element drags.

  • Drop validation checks all elements against target; all must pass.

  • SetObjects() for multi-object editing when multiple elements selected.

  • Name area shows "(+N)" badge; tooltip lists all selected elements via OnGenerateCustomDetailsPanelNameWidget.

  • New SupportsMultiEditInDetailsPanel() virtual to opt out.

  • F Dragged Element Entry: Element wrapper with bIsContainedInAnotherDraggedElement flag.

  • F Data Hierarchy Drag Drop Context: Wraps entry array with GetTopLevelEntries/GetPrimaryElement.

  • FHierarchyDragDropOp takes FDataHierarchyDragDropContext; CreateDragDropOp signature updated.

  • CreateDragDropOp overrides updated for new signature.

  • Custom drag decorators render all elements vertically for multi-drag.

  • Multi-edit disabled via SupportsMultiEditInDetailsPanel.

  • FInstancedStructDataWithHeaderDetails uses EnumerateConstRawData instead of GetValueData.

  • Fixes missing category headers (e.g. "Numeric") during multi-object editing.

• Added a Crash Diagnostics panel to the Editor Diagnostics window to view recent editor crashes.

• Add button to enable/disable editor shortcuts when PIE is active.

• Added Dynamic Invalidation to the Material Editor Graph.

• Added Data Hierarchy Editor support to FInstancedPropertyBag:

  • PropertyBagSchema class can now direct the property bag details to an optional HierarchyRoot object.

  • PropertyBagSchema class also contains information about hierarchy types.

    • This can be used to subclass and add properties.

  • Moved some util functions around hash calculation into public

  • Replaced some UEdGraphSchema with UPropertyBagSchema.

  • Added more encapsulation so that FPropertyBagInstanceDataDetails is more standalone and can be subclassed.

  • Removed some of the construct params in favor of FPropertyBagInstanceDataDetails looking relevant data up via property handle.

  • Added InstanceMetaData support to allow forwarding metadata to an inner FInstancedPropertyBag.

• S Subobject Editor::FindSlateNodeForHandle: find slate node for FSubobjectData that doesn't have a WeakObjectPtr but does have a corresponding teds row.

• Project Launcher fixes for recent changes in Cooker behavior:

  • Zen Streaming content scheme is only used for new profiles when bUseZenStore and AllowRemoteNetworkService are set.

  • Add profile validation error when trying to use Zen Streaming to a remote device when AllowRemoteNetworkService is false.

  • Platforms menu Quick Launch disables unversioned cook when using LegacyIterative.

• Added Dynamic Invalidation to the Place Actor Panel.

• Added Dynamic Invalidation to the Content Browser.

• Added Dynamic Invalidation to the Scene Outliner.

• Added support for drag-and-dropping a texture onto an existing texture sample node to replace the texture.

Bug Fix:

• UMG/Slate

  • Fixed SListView ScrollIntoView alignment math (local-space deltas and CenterAligned culled-target offset) so centered and partially clipped items scroll correctly at non-default DPI.

  • Fixed proximate intra-entry navigation to reject focus targets outside the list bounds when bEnableProximateEntryNavigation is enabled.

• Fixed crash in PropertyPathHelpers::SetPropertyValueFromString when propagating properties to widget archetype instances.

• S Draggable Box: Fix for single right-click entering drag mode.

• Fixed selection outline of Nanite-enabled mesh components when selecting individual components below an actor. Previously, deselected components on the same actor would not render with the muted outline color.

• Fixed the editor selection outline of Nanite-enabled Skeletal Mesh and Instanced Skinned Mesh components.

• Fixed overlay colors not working with non-Nanite Instanced Static Meshes.

• Fixed nullptr dereference when generating tooltip in widget reflector for native widget class types.

• Tool Widgets: Fixed SDraggableBoxOverlay accumulating Padding when invoking SetBoxAlignmentOffset with center alignment.

• Fixed crash when dismissing notifications after hot-reload.

• Fixed right click crash on tagged asset browser sections.

• Fixed incorrect transform handling of static meshes in the viewport.

• Optimize select actors in statistics tab.

• Fixed edit change conditions not correctly gathering the edited UObject if it's an instanced struct that was added to the UI, as a complex parent was found on the way up that was not the owning object node.

• Fixed missing objects in property change event for edit condition toggling.

• Fix an issue where Status Bar tool tips appeared in another screen (or overlapped the status bar if there was no monitor to the right).

• Added IsAssetVisible check for tagged asset browser extension functionality.

UX

New:

• Added new input settings tab containing keyboard shortcuts and future shortcuts.

  • Added sidebar to settings editor that shows left panel when more than one item (docked) and hides when it contains a single item.

  • Import/export (All) will only handle shortcuts instead of all editor settings now.

  • Updated autocompletion and suggestions to use new container.

• Improved Settings Editor UI to match the rest of the editor (tree view, splitter, category, style).

  • Improved search to only apply to the selected section instead of showing all results.

  • Improved Filters and suggestions to be dynamic and (dis)allow specific sections (they only appear in the proper context).

  • Added keybind action button to search for specific keys pressed.

  • Allow partial search match from begin or end.

  • Added icons for keybind and cvar filters.

• Added advanced preview scene options to customize floor, floor rotation, floor scale and floor material.

  • Added advanced preview scene option to clone a profile from existing ones.

  • Added advanced preview scene keyboard shortcuts to navigate to next/previous profile (SHIFT+ALT+Up/Down).

  • Reworked the preview scene settings tab UI.

  • Property AssetPicker can now be customized with additional metadata to set ViewType, ThumbnailSize, ThumbnailScale, SettingsName.

  • Deprecated "show grid" property since it's not relevant to all context.

  • Fixed preview scene not loaded properly on editor startup.

• Property Editor: Add an option to add a color bar on every row in the category.

• Persist import interpolation mode for reimporting CSV as curve table.

• Interactive Tools Framework: Modified UInteractiveToolPropertySet::SaveRestoreProperties to only instantiate a property cache entry when saving. This permits successive calls to RestoreProperties to behave as expected, particularly in the case where a tool inherits from a base tool class, but wants to modify the defaults of an inherited property set. In that scenario, both the base class and derived class would issue RestoreProperties on the inherited property set.

  • Prior to this change, the first call to RestoreProperties would instantiate the property cache and detect that the property cache was just created to avoid the restore. The second call to RestoreProperties would incorrectly see the just created property cache as evidence that there is saved data to restore and copy the default CDO data to the tool.

  • By only instantiating the property cache on save operations, the behavior is more consistent and avoids tools having to create awkward workarounds using separate property cache IDs to workaround the issue.

• Fixed combo box widget tooltips appear on dropdown list items across the editor making it hard to navigate across options.

  • Added a way to extend force repel zone on any widget with a slate attribute.

• Added scale option in config for warning/error messages in texture editor viewports.

• SSegmentedProgressBar is now available for displaying the progress of a multi-state workflow.

• Replaced delete content browser popups by dialogs to attract user attention (folders, favorites, collections).

  • Improved delete dialog widget to include pending deletion folders.

  • If the folder is not empty and contains assets, a first dialog will be shown to avoid loading all assets recursively on a mis-click otherwise only the main delete dialog widget will be used.

• Re-enabled delayed change notification on SceneOutliner search.

• Added asset class icon with color to the save all dialog content table row.

• Updated content browser suggestion filtering so only paths starting with the currently typed text are shown.

• Open editor, project, input settings in "All settings" by default instead of "Appearances" and "General" since search is now localized.

  • Auto focus search box when opening settings.

• Added drag and drop support from content browser to material editor viewport to change preview mesh.

  • Dropped preview mesh will become default preview mesh when reopening asset editor.

• Added Material Instance to custom filter in content browser to search for these asset type.

• Add recursive expansion/collapse on TreeViews when navigating with the arrow keys to match the shift-click expansion arrow behavior.

• PCG Property Bag: Hierarchy Editor Support added.

• The editor layout now properly restore the position and scale of the level editor window position and the other windows managed by the tab manager.

• If CTRL is pressed and folder are dragged then copy/move folders is performed on drop.

  • If CTRL is not pressed and folders are dragged then add/reordering favorites is performed on drop.

  • If favorites folders are dragged then reordering is performed on drop.

  • If file assets are dragged then copy/move items is performed on drop.

• Fixed ToolTip Override that was not working for FPropertyHandleBase::CreatePropertyNameWidget.

• Show Favorites/Modified sections in details panel filter bar, use details settings and check "Show Helper Sections"

  • Add/Remove category items from favorites using context menu on a category.

  • Expand/Collapse details panel root categories using shortcuts : CTRL+SHIFT+X and CTRL+SHIFT+C, menu entries and commands actions are now using the same code path.

  • Fixed SHIFT+Click on expansion arrow do not recursively expand advanced category.

  • Grouping properties based on their original category in favorites and removing Advanced.

• Enabled search in data table row editor.

• Allow reordering of favorites list (above or after).

  • Disallow move or copy operations of folders in the favorite list.

  • Added edit favorite dialog to set an alias and shortcut to a favorite item (through context menu).

• Content Browser - Column View : Added description of how many columns are displayed and from what asset type they are from. Without that information, it's hard for a user to understand there are some missing columns simply because they're not part of the columns of the asset type for which there's the most assets on display.

• Added context menu entry in editor preference and project settings to copy associated CVar to the clipboard if any.

  • Added row extension button to quickly spot properties with a CVar and copy them to clipboard.

• Improved "Keyboard Shortcuts" editable input UI to follow unreal theming.

• Fixed ContentBrowserModule's "AssetClassesRequiringDynamicTags" feature. It now stores classes as FTopLevelAssetPath in order to properly detect them. Also, now, child classes of an asset class requiring dynamic tags are also considered requiring dynamic tags.

• Added an option to sort the content browser filters in alphabetical order or insertion order.

  • Refactored loading filter code to restore filter in the correct order instead of the random type registration order.

  • Reordered all context menus in the content browser to be alphabetically sorted (Other filters, Custom filters, Common filters).

• Added Open Screenshot Folder button to High Resolution Screenshot tool.

• Added browse to asset when right clicking the tab of an editor asset tab, action is only enabled for assets (non transient).

  • Added browse to level when right clicking the tab of an editor level tab, action is only enabled for saved level.

• Use the class display name when showing the asset type in the generic asset viewer (as we do in the Blueprint editor).

  • The tooltip now for the "go to source" hyperlink shows the native class name for both the Blueprint editor and asset viewer.

Bug Fix:

• Fixed sidebar widget stays in an intermediate state when clicking multiple times on the sidebar button.

• Asset thumbnail: Fixed color that was not updated to match the asset type color in some cases.

• Fixed Blueprint Editor Drag and Drop of asset in tree hierarchy does not match user intent.

• Fix an editor crash that could occur for reset to default on class reference values in the details view.

• Fixed non-displayable references list is not interactable when deleting pending assets in dialog.

• Fixed set and map property editors that would not show "Multiple Values" when editing multiple objects with a different number of items (they both behave like the array property editor now).

• Fixed asset search box suggestion width should match search box width instead of changing based on in view content.

  • Fixed content browser search suggestions should appear above to avoid obfuscating filtered results.

• Content Browser: Fixed an issue where the previous opened path would not always be restored properly when rebooting the editor.

• Add missing support for instanced struct value edit propagation and some fixes for its reset to default UX.

• Fix for stomping an annotation that has already been set during edit change propagation.

  • (Example) This was (incorrectly) marking child BP assets as needing to be saved if they happened to be open for edit alongside their parent in the BP editor, in cases where they would (correctly) not be dirtied if not also open for edit.

• Fixed the AI assistant tab label centering in the Panel Drawer.

Foundation

New:

• Optimized FSplineMeshSceneProxyDesc::CalculateShaderParams to skip calculating the MeshDeformScaleMinMax if the mesh isn't nanite enabled. MeshDeformScaleMinMax is only used for nanite LOD calculations and computing it is very expensive.

Bug Fix:

• Based on, fixed two issues in primitive drawing utilities:

  • DrawFlatArrow now correctly applies the thickness parameter, which was previously unused.

  • F Batched Elements::AddReserveLines no longer reserves twice the required number of line entries, reducing unnecessary memory allocation.

• Fix FCompression initialization could occur on first use on a thread, causing a crash.

• Quote path of PerfreportTool.dll when calling it from AutomatedPerfTestNode.

Build

New:

• Update Intel OneAPI supported version to 2026.0.0.

• Add UE_PLATFORM_* definitions to mirror existing PLATFORM_* definitions.

• SN-DBS now uses per-platform tool template directories to avoid rare cases of ambiguity when compiling for several platforms at once.

  • Requires SN-DBS 2.6.10.1020 or later to utilize the new code path. Support for older versions of SN-DBS remains, but UBT will emit an error if it encounters a situation that requires the upgrade.

• Added -SkipEncryption support for IoStore containers.

• Remove 2GB limitation when generating psym files by never storing the output as a string.

• UhtSpecifierValueType.Legacy is now obsolete. UhtSpecifierValueType.None should be used in its place.

• Added packaging option to allow specifying alphabetical-cluster-sort and alphabetical fallback ordering for a specific prefix match of container names.

• Added support for patterns such as "FString()" for default values in UFUNCTIONs.

• Build Graph: Added option ErrorIfNotFound to RetrieveArtifactTask to control if an error is thrown when an artifact cannot be found.

Bug Fix:

• Add support for UStructs in namespaces for TInstancedStruct properties.

• Set DefaultBuildSettings for the BlankProgram template. This prevents compilation errors when the template is used outside the engine folder.

• Add support for UStructs in namespaces within RigUnit.

• Fixing an issue where types wrapped in WITH_EDITORONLY_DATA would not have that definition reflected in the generated code.

• SNDBS: Prevent exception when there is no explicit_input_files key.

• `class IFoo {... }; UCLASS() class UFoo : UObject {... };` no longer results in an error claiming that IFoo is missing GENERATED_BODY().

• Fixing issue where delegates were not properly bound by #if/#endif pairs in their definitions. Added "Editor" as a distinct defined scope separate from EditorOnly.

Compile Time Improvements

New:

• Reduced linking time on clang with LTO by disabling debug info upgrading, sice we build everything with the same toolchain.

Core

New:

• DDC

  • Added record/value to cache put responses to give callers a copy of what ended up stored in the cache.

  • Added ApplySkipPolicy to apply ECachePolicy::Skip to values and records.

  • Added a constructor for FCacheRecord from FCacheKey.

  • Added TryLexFromString for FCacheKey and FCacheBucket.

  • Added support for natively-async cache stores to skip creation of an async wrapper.

  • Added cache store tests.

  • Added custom cache graph support with, e.g., -DDC=(EnginePak,Cloud), or in the same format with the DDC.Graph CVar. Any configuration that is valid in a graph is supported, such as -DDC=(ZenLocal,Cloud(ReadOnly=true)) to create a graph with ZenLocal and a read-only Cloud.

  • Added BuildLegacyCacheKey to support migration from the legacy API.

  • Removed unused short key and legacy mode functionality.

  • Updated graph creation to use the new config API.

  • Require that RawHash matches when present in GetChunks(). It was a hint and now it is a requirement to avoid callers receiving different data than they anticipate.

  • Added ECachePolicy::NonDeterministic to flag known-non-deterministic data to avoid noise in -DDC-Verify mode.

  • Serialize put requests into replays and replay them as gets.

  • Improved DDC graph selection. Consider every -DDC=... command line argument as a candidate. Removed broken -DDC=None functionality. Fixed DDC.Graph CVar overriding the installed default by making it empty by default. Added -DDC-NoDefaultGraph command line argument to remove the default graph from consideration.

  • Added a linear-probing hash table for internal use by DDC and DerivedDataTool.

  • Added a concurrent chunked sparse array for internal use by DDC and DerivedDataTool.

  • Removed obsolete DDC WaitForQuiescence from AppPreExit.

• Compact Sets: Resolved remaining issues to allow compact sets to be enabled safely:

  • Re-added key storage to ensure full compatibility with GC and object relocation.

  • Fixed natvis and GDB printers for sets and compact sets.

  • Removed unused feature auto relax map.

  • Reworked compact set lookup algorithm to account for some specific edge cases.

  • Improved run-time detection of broken lookup, usually due to external memory changes.

  • Added BuildConfiguration option bUseSparseSetStrictMode that, when enabled, will cause spare sets to be more strict in their usage so compile issues can be fixed to allow switching over to compact sets.

  • Added BuildConfiguration option bUseCompactSetAsDefault that, when enabled, will swap the implementation of TSet and TMap to use compact sets instead of sparse sets. TCompact[Map|Set] and TSparse[Map|Set] still exist for explitic usages, but explicit forms cannot be used as UPROPERTY's.

  • Perf: Enabling compact sets in Fortnite saw 40-90MB of memory savings, depending on platform, as well as overall improved performance in most CPU threads.

• Add TSubScriptStructOf. Similar to TSubClassOf but for UScriptStruct. Add an editor picker that works with NoClear and the metadata.

  • Meta Struct: The struct path of the base struct displayed in the picker.

  • Show Tree View: The picker uses a tree view or a list view to display the available struct.

  • Show Display Names: Uses the DisplayName of the selectable struct.

  • Hide View Options: Hides the options menu in the picker.

• Struct Utils: FInstancedPropertyBag serializes with the default values. With tagged serialization, the full instance will be skipped if the descriptions and the values are the same. If the descriptions are the same, only the values that are modified will be serialized. If the descriptions changed, then the default is not used. When using FInstancedPropertyBag in a BP, it might appear that it works without this changelist. This is due to the reinitialization process during compilation. Without this change list, it might not work depending on the loading order.

• Added "UObject Count" trace counter.

• Introduce indirection for AssetRegistry cache files, so we don't need to overwrite them.

• Introduced UE_JSONOBJECT_LEGACY_STRING_KEYS which defaults to 0, set to 1 to revert FJsonObject to its FString-based interface.

• Replaced the hash for FNameEntryId to avoid extremely poor worst-case distribution.

• Added asset chunks deduplication option in UnrealPak for IoStore containers, accessible via [/Script/UnrealEd.ProjectPackagingSettings] bDeduplicateChunks=true.

• Added C++ Concept for pointer convertibility.

• Added support for non-power-of-two FName pool shard counts, to allow alleviating hash table load without needing to double the capacity.

• `TVariantPtr` no longer requires non-UObject type to be `TSharedFromThis`, accepts `TSharedPtr`.

• Added the concept of auto-loading non-plugin modules based on.ini settings (see Auto Load Modules By Phase: And [AutoLoadModulesByPhase_Editor] in BaseEngine.ini).

  • Making use of it to load TargetPlatformManagerModule earlier to kick off the async UBT process.

• Prevent LexToString(bool) from hijacking types that implicitly cast to bool. This makes missing or unresolvable LexToString overloads fail at compile time instead of being hidden by a bool conversion.

• Added UE::CInsertable as a proper concept and UE::CInsertableInto that reverses the parameters.

• Added FText::AsMemory overload accepting a specific EMemoryUnit.

• Fix json library to use actual object class instead of static class from templated class type.

• GC: Add the option to GC based on pending actors to unload (in addition to existing mechanism that uses number of levels) for finer control (disabled by default). Number of levels can be inaccurate given the discrepancies between level counts and memory impact. across main grid / data layers Add the option to GC based on pending actors to unload (in addition to existing mechanism that uses number of levels) for finer control (disabled by default). Controlled via `s.ContinuouslyIncrementalGCWhileActorsPendingPurge`/ `s.LevelStreamingLowMemoryActorsPendingPurgeCount` and `wp.Runtime.LevelStreamingContinuouslyIncrementalGCWhileActorsPendingPurgeForWP` (for partitioned worlds).

• Added the frame counter (when present) to structured log output.

• Oodle updated to 2.9.16.

• Added natvis visualizers for Compact Binary.

• Added MoveAssignScriptStruct to UScriptStruct for move-semantic support in type-erased struct operations. Introduced the WithMoveAssign trait on TStructOpsTypeTraitsBase2 (following the pattern of WithCopy), the STRUCT_MoveAssignNative flag, the FCapabilities::HasMoveAssign capability, a MoveAssign fake-vtable entry, and ICppStructOps::HasMoveAssign() / MoveAssign(). STRUCT_MoveAssignNative dispatches to C++ operator=(T&&); STRUCT_IsPlainOldData uses memcpy; the fallback calls CopyScriptStruct for zero regression on non-opted types.

• Parking Lot: Use low-level virtual memory API for allocations to allow our allocators to depend on ParkingLot.

• Rename some private stats types to avoid collision with platform SDKs.

• Deprecate and remove the FField virtual functions Bind(), PostLoad() and BeginDestroy() that are implemented but never called.

• Added && TShared/Weak... constructors and StaticCastShared/Weak... helpers. Removed WeakPtr from TSharedFromThis.

• Changed MallocBinned3 max small bin config to 14kb by default as it offers better performance\memory in our testing.

• Added filtering by key to the derived data cache key filter used for simulated misses, verification, and replay.

• Added IsLockedByCurrentThread() to the recursive mutex types.

• Implemented an easy-to-use mechanism for deprecating existing cvars.

• Asset registry cache will now memory-map its tag data storage, reducing RAM footprint by GBs in large projects.

• Made TSharedString transactionally safe by using TTransactionalAtomicRefCount.

• Converted UE_LOG to use log records internally. This adds file, line, and context to every UE_LOG even though they are inherently unstructured.

• Simplify serialization of ClassFlags in UClass::Serialize by updating and always using CLASS_ShouldNeverBeLoaded.

• Reduced the stack cost of a failed ensure from ~32 KiB to ~2 KiB.

• Added packaging of Derived Data Build Workers and updated DerivedDataTool to work with them.

• Made UTF8TEXTVIEW constexpr.

• Added -CookPackageDir= to the cooker to allow cooking a directory, and when combined with -cooksinglepackagenorefs, then only that directory will be cooked.

• Added a DerivedDataBuildController to support compiling shaders through the Derived Data Build API.

• Improved to the Derived Data Build Worker startup time. Fixed directory deletion in the local executor for the Derived Data Build Worker.

• Runtime: Add: WebRTC initialization on Android.

• Optimized variable-length integer encoding in VarInt.h.

• Allow an IInstallBundleSource implementation to override the default PAK mount priority via its FInstallBundleSourceUpdateContentResultInfo.

• Added OnHDRScreenshotCaptured delegate to UGameViewportClient, fired when an HDR screenshot is captured. OnScreenshotCaptured does not fire when HDR is enabled. A separate delegate is needed to allow returning the HDR bitmap as TArray<FLinearColor> rather than TArray<FColor>.

• Removed unnecessary dependencies from LauncherServices, RenderCore, ShaderCompilerCommon, and TargetPlatform Reduces the size of programs like ShaderCompileWorker that do not otherwise depend on some of the removed dependencies.

• Added TargetRules.bEnableConfigSystem to allow disabling loading config.

• Enable range-based for loop support for `TFilterCollection`.

• Commandlets will now print peak used memory at the end of their execution.

• Added option in UnrealPak to keep unchanged assets at the same file offsets in IoStore containers as they were in the previous build, accessible via [/Script/UnrealEd.ProjectPackagingSettings] bUsePatchInPlaceLayout=true.

• No longer performs a normal config save if the PreSaveConfigFileDelegate returns that it saved the file. This can reduce some slow unnecessary disk operations on some platforms. Can revert to original behavior by either setting ini.SkipSaveIfPreSaveSucceeded to 0, or by not incrementing SavedCount from your delegate implementation.

• Add cvar, core.EnsureBreakEnabled (default:True), to disable debugger breaking when ensure statements are hit to allow skipping unrelated ensures while debugging longer processes.

• Added a DerivedDataTool Copy command to copy data between caches.

• TLruCache: Add SetMaxNumElements / Declare default move constructor/assignment and define proper copy/assignment as they are currently broken (with unittest) [PCG] Cache: optimize cache grow and use SetMaxNumElements instead of the previous full copy that was happening.

• Streamable Manager:

  • Added a mechanism to just-in-time trickle async load requests on a streamable handle.

    • Added a mechanism to batch/trickle async load requests on a streamable handle.

      • Opt-in (enabled via UE_ENABLE_STREAMABLE_JIT_ASYNC_LOADING=1) and by setting bUseJustInTimeAsyncLoader=true or if batching is enabled globally (s.StreamableEnableJITAsyncLoadingGlobally).

    • The initial batch size is set as per s.StreamableJITAsyncLoadingInitialBatchingFactor which is a factor of the total number of requests queued for a streamable handle (default is 0.25).

    • This can be used to cancel or queue subsequent async load requests at updated priorities (see FStreamableHandle::SetPriority) which would get picked up when subsequent requests are queued.

    • Opt-in by setting bUseJustInTimeAsyncLoader=true or if batching is enabled globally (s.StreamableEnableJITAsyncLoadingGlobally).

• Optimized FMath::RoundUpToPowerOfTwo[64] for Clang.

• Used MPSC queue instead of MPMC queue for log output.

• Added && to Value and operator* in TOptional.

• Refactored UObject::LoadConfig into some Context objets to break up the wall of code and also be able to more easily add functionality (like passing a preloaded FConfigFile to LoadConfig).

• Added TAutoConsoleVariableDeprecated_NoReplace CVar type that is used to deprecate a cvar without replacing it with another one. The value can still be queried, but it will ensure (or warn or assert depending on setting). Similarly, FAutoConsoleCommandDeprecated_NoReplace was added for deprecating a command without pointing at another.

• Added support for an optional.ini file that is applied after engine/project plugins and before GFPs and Hotfixes. This allows a project to override plugin settings if needed (likely to be rare, but there is a use case for it). It is called PluginOverride.ini (ie PluginOverrideEngine.ini) and is stored in Project/Config. There is no per-platform version.

• Added bool return type to FConfigCacheIni::Flush to know if the information was actually written to disk.

• Added parameters to TGuardConsoleVariable to be able to specify priority when setting cvars from testcode.

• Added FrameNum and UTC time to stat unit so we have a way to match up video captures with logs, etc. Requires setting "stats.UnitTimestamp" cvar to enable.

• Use UTF-8 for structured logging format strings.

• Added the UE_LOGF family of macros for unstructured logging with UTF-8 format strings.

• Added FPlatformString::FormatV and TCString::FormatV to provide GetVarArgs with a usable return value.

• Add EAllowShrinking arg to TIndexedContainerIterator::RemoveCurrent and TIndexedContainerIterator::RemoveCurrentSwap.

• Added concept UE::CContiguousRangeOrRef.

• Moved GetDataHelper to UnrealTemplate.h.

• Assert on re-entrant calls in ParkingLot to catch invalid usage by callers.

• Added WaitFor and WaitUntil to FConditionVariable.

• Added console command to reload a package in the editor, including in -game obj reloadpkg package=/Game/Foo.

• Added the OptStreamGotTo optional param to most of the FParse::Value() functions (it was only on string versions before). Didn't add to FText version because it uses a different parsing code that doesn't return the end of the value.

• Added trait TIsCharEncodingCompatibleWithUTF8CHAR.

• Add error detection for SQLiteSupport.

• Moved log category macros to LogCategory.h.

• Fixed WarnFilterScope for structured logging and added CHECK_LOG_SCOPE for common cases.

• Cleaned up the unused FConfigFileHierarchy::DynamicKey code.

• Allow plugins to have PluginName.ini along with Base/DefaultPluginName.ini (but deprecated).

  • Also deprecated BasePluginName.ini so we can eventually look for fewer ini files during plugin mounting.

  • Show a message with GFP old style names as well.

• Removed unnecessary confighierarchy entries, and plugin config branches that have no static layers.

  • Removed the "config xxxx" console commands in SHIPPING.

• For GameFeaturePlugins, renamed Conole Variables: And [ConsoleVariables_HighPriority] to [PluginCVars_LowPriority] and [PluginCVars_HighPriority]

  • Added initial support for them in Preview, although it only works if in Engine.ini files, a future change will work to address this.

  • GFP Hotfixes still use Console Variables: Because they set at Hotfix priority, not Plugin.

Bug Fix:

• DDC

  • Allow records with no values in the Memory cache store. DDC: Report an error when the memory cache store exceeds its size limit. DDC: Verify that content exists in the FileSystem cache for differing values even if they are expected to be non-deterministic.

  • Fixed Zen client support for out-of-bounds chunk reads.

  • Fixed out-of-bounds chunk reads in the memory cache store.

  • Validate RawHash in compressed buffer headers to mitigate invalid data being returned by Zen.

  • Fixed a dangling string view in TryFindCacheGraphConfig.

  • Fixed a file system cache store race with initialization of FRandomStream relative to starting the maintenance thread.

  • Fixed a crash in FTimeAveragedStat and added tests.

  • Fixed use of ',' as a delimiter in unquoted arguments for simulated miss types and keys in DDC.

  • Fixed a DDC crash when recovering from a failure to create a non-default graph containing a pak store.

  • Fixed Cloud DDC reauthentication during shutdown by ensuring that DesktopPlatform unloads after DDC.

• Add a CVar named "Serialization.EnforceLinkerObjectBounds" (default true) to bounds check object data reads from.uasset in editor - this makes loading data after changing a variable type safer.

• F Instanced Struct Container: Fix missing default initialization of items prior to serialization on load causing invalid values if delta serialized.

• In FMonitoredProcess::TickInternal(), set bIsRunning = false _before_ calling OnCompleted(), so a Completed delegate can call GetFullOutputWithoutDelegate() without asserting. (Same change to OnCanceled())

• Fixed a dangling pointer in FConfigContext when using TemporaryBranch.

• Fix FName::CompareSensitive not always comparing case-sensitively.

• Allow newly created packages with a file on disk to be reloaded.

• Updated "stat fps" frame time indicator to use the same smoothing factor as "stat unit".

• Windows Platform File: Fix IterateDirectory to honor the contract to return false if the input directory does not exist. Keep the behavior that it returns true for directories that exist but are hidden or otherwise uniterateable.

• Updated FObjectPropertyBase::ParseObjectPropertyValue and FSoftObjectPath::ImportTextItem to handle parsing object paths with spaces in them.

• GameFeaturePlugins can now work from locations listed in AdditionalPluginDirectories (in a.uproject).

• Do not reset external package when renaming actor changing outer in PIE packages, fixing the asymmetry.

• Core/HAL: Fix: FSharedEventRef not respecting EEventMode passed in to the constructor.

• DiagnosticCheckNaN functions in various math library types no longer change the object being tested to a non-0 default value. This will increase the number of log messages but the old behavior involves mutation in a const member function and was a potential data race.

• Adjust CheckObjectValidBasedOnItsFlags to be consistent with other validity check such as TWeakObjectPtr::Get.

• Ignored SetColor verbosity in FOutputDeviceDebug.

• Fix for CrashReportClient reading project settings when bAllowNonUFSIniWhenCooked is set.

• Log an error if the class import doesn't have an outer (i.e reported as a package) when calling GetExportClassPackage.

• Fix multiple bugs where object flags and properties were not correctly copied over during reinstancing.

• Fixed a potential FPropertyTag issue when saving a static array with a property guid.

• Disabled the logging backlog at the end of PreInit for program targets to avoid unbounded backlog growth for programs that do not call GEngineLoop.Init().

• Fixed restarting workers with the incorrect number of task workers if the platform has a thread config. Changed the code to reinitialize with the existing number of workers.

• Fix for CriticallyDampedSmoothing when using target velocity.

• Correctly set ETaskTag::GameThread for the lifetime of the LowLevelTests test runner.

• Fixed initialization of the static thread ID in FTaskTagScope.

• Added a compiler flag to allow the work-stealing task queue to explicitly yield the thread if it fails to steal a job after a certain number of iterations (to avoid a deadlock).

• Fix for a rare memory stomp inside ServerMoveClientError. It is possible for the ServerPredictionData to be nullified part way through this logic (through a delegate fired in MoveComponent), which would mean the ServerData pointer is pointing to stale data. Reacquiring the ServerPredictionData guarantees the data is valid. Fixed a rare memory stomp inside ServerMoveClientError if MoveComponent causes a call to Unpossess.

• Adding FMA intrinsics when compiling with MinimumCpuArchitectureX64.AVX2 on Clang.

  • This fixes a compile error in the Eigen library when compiling AVX2 on Dedicated Servers using Clang.

  • This is because when compiling using the VCToolChain using Clang, we still define _MSC_VER so the Eigen library assumes FMA is included because MSVC always includes those intrinsics when using /arch:Avx2.

  • This change brings our Clang configuration in line with MSVC when using AVX2.

  • Note that this does not change the ffp-contract behaviour, so will not allow the compiler to optimise multiply add operations automatically.

  • Added FMA intrinsics when compiling with MinimumCpuArchitectureX64.AVX2 on Clang.

• No longer reconstructs a subobject after instancing its missing outer if it already constructed the subobject from the source archetype (optimization).

• Fix TPagedArray not forwarding allocator to internal Pages array.

• Remove the IniKeyDenylist and IniSectionDenylist from all layers of the BinaryConfig, instead of just the final InMemoryFile.

• Fixed TFunctionWithContext to support function pointers.

• Added some thread safety to FConfigCacheIni::ReadString (which the others like GetInt go through), SafeReload, and AddDynamicLayersToHierarchy.

• Apply FObjectInitializer instancing exclusions only to the object being constructed/initialized.

• Fixed TFunctionWithContext to support assignment from a const lambda.

• Disable editor-only data for non-editor platforms in FoundationTests.

• Fix duplicate warnings when LoadObject fails and improve the messages.

• Fixed access violation in libcurl 8.12.1 when under heavy load from during cook commandlet. The curl team has already fixed the issue in 8.16 and later.

• Fixed FHashTable buffer overrun on shrinking.

• No longer loads plugin ini files from subdirs (like Tags).

• T Compact Set: Ensure that elements are rehashed after being serialized during reference replacement.

• Fixed a HybridPackageStore init issue when no zen snapshot exists.

  • Fixed some issues with getting PackageStore info when we don't have a package name (in ImportPackagesRecursiveInner sets bHasImportedPackageNames to false).

• Updated UE_LOG_CONTEXT to be safe for use in transactions.

• Task Graph: Fix TGraphTask execute scopes not being emitted to Insights when using lightweight stats. Fix TGraphTask execute scopes not being emitted to Insights when using lightweight stats.

• Removing an unneeded CheckSlow in TCircularBuffer(uint32 Capacity) constructor that was checking for a capacity of 0. FMath::RoundUpToPowerOfTwo returns 1 for both a value of 0 and 1 so the buffer is established with a valid capacity regardless of what's passed in so the check isn't needed.

• When writing out the config file in FConfigFile::UpdateSections, don't write out the file if it matches the current file. This will make it so files like DefaultEngine.ini don't get marked as "changed" by some source control.

  • Slightly changed the COnfigModificationTracker class to be able to use bTrackLoadedFiles more often with worrying about tripping the code to not load a file that was already loaded (reducing side effects of using bTrackLoadedFiles).

  • Now added context in the Console Variables:/[COnsoleVariables_HighPriority] deprecation ensures.

• Fixed missing assignment of OutObjectId in MakeReferenceIds in FObjectHandle.

• Fixed console command arg parsing to support ""

• Added loop break in EarlyPlayFrameTick if engine exit has been requested to fix related hangs.

• F Tick Function Task::DoTask and FBatchTickFunctionTask::DoTask functions' TickContext parameter have the proper TickGroup set (instead of always being TG_PrePhysics).

• Fixed conversion from TArray in FArrayProperty.

• Fix for decltype on angle delta functions.

• Fix bug with FUnitConversion converting values that did not need converting. Resulted in values that were slightly off due to conversion precision limits.

• Fixed an incorrect optimization in FString::MatchesWIldcard and related funcs. It would flag matches incorrectly in certain rare cases.

Deprecated:

• Deprecated functionality in the UE4 API DDC that is no longer supported.

• Deprecated FCoreDelegates::OnPostEngineInit in favor of FCoreDelegates::GetOnPostEngineInit() to fix missing registrations that occur during static initialization.

• Deprecated PLATFORM_ENABLE_POPCNT_INTRINSIC and the associated FPlatformMisc::HasNonoptionalCPUFeatures() and FPlatformMisc::NeedsNonoptionalCPUFeaturesCheck().

• The UObject::Rename flag REN_ForceNoResetLoaders has been deprecated as UObject::Rename will no longer call ResetLoaders or flush loading during renaming as this was the cause of unnecessary loading stalls, and could introduce hard to diagnose bugs due to the sync load in the middle of a possible temporarily, intentionally incorrect UObject state such as during Blueprint reinstancing.

  • Rename will still attempt to maintain a package's Linker export mapping as renames occur unless the flag REN_AllowPackageLinkerMismatch is provided. As a result without specifying REN_AllowPackageLinkerMismatch, Rename will detach the linker from a loaded object whenever the object is moved to a new package.

  • Similarly, renaming a loaded object without specifying REN_AllowPackageLinkerMismatch will detach the export object from the linker that loaded it allowing future package requests for the same package to load a new object instance using the original object name if no object redirector was created during renaming (i.e. REN_DontCreateRedirectors).

  • If an object is being renamed and future package reloads should not create a new instance of original object name, InvalidateExport() should be called on the object before renaming. In cases where one wants to temporarily rename a loaded object and then rename it back to its original name, (REN_AllowPackageLinkerMismatch | REN_DontCreateRedirectors) should be provided as your rename flags to ensure the export is not detached.

• Deprecated PLATFORM_TCHAR_IS_4_BYTES.

Dev Tools

New:

• Unreal Build Tool

  • Support for APX for x64 architecture.

  • Implement.pvsconfig support for PVSToolchain.

• Added TraceQuery, a CLI tool for querying.utrace files as JSONL.

  • TraceQuery is a lightweight standalone UBT program that reads Unreal Engine.utrace binary trace files and outputs structured JSONL to stdout, enabling scripted performance analysis without UnrealInsights or the editor.

  • It depends only on Core, TraceAnalysis, and TraceServices, and decodes named stats, named counter time series, session diagnostics, frame boundaries, and CPU profiler scope events.

  • CPU scope events are buffered per (thread, specId) and flushed as grouped arrays to avoid per-event output for high-frequency scopes. The CLI supports filtering by logger, event name, stat/counter substring, and time range (--start-time / --end-time in seconds).

• Bump preferred MSVC to 14.50.

• Linux HWPGO support.

• Add Raw Pairs to TMap natvis.

• Expose a unique session identifier for each UBT invocation.

• Implement the UAT "-CompileOnly" command line option already documented in the usage info. It will compile all out-of-date script modules before exiting without running any command.

Bug Fix:

• Unreal Build Tool

  • Fix Dynamic Debugging LiveCoding Interaction.

  • Fix sln icon in the shell not displaying vs version, by removing empty first line in sln file.

• Fix ambiguous call converting method group to string.

• Fix RPC InputKey not processing Tapped inputs The Tapped parameter was previously omitted from the RPC arguments dictionary. Created conversion method "AsRpcArgs()" to automatically include all properties decorated with JsonPropertyName, eliminating the possibility of forgetting parameters.

• Make UpdateLocalVersion commandlet write P4 CompatibleChangelist into Build.version.

• UHT: Fix format string when usage in member declaration detected without an alternative, in UhtIssueBehavior.AllowAndLog case.

• Make UAT and UBT out-of-date DotnetDepends checks more robust when launching multiple instances on Windows. The tools themselves check a mutex, but the bat files could previously try to rebuild a tool by before that point.

• Mitigate race condition in ImmediateActionQueue.

• Fixed C# P4 BatchedCommand helper calculating the wrong length and overflowing the 32,699 character limit It wasn't taking into account the length of the base Command or GlobalOptions, which are also added to the arguments when running p4.exe.

Horde

New:

• Horde

  • TokenConfig ClientId and ClientSecret can be read from a Horde secret during configuration load.

  • Added OptionalRequires attribute for BuildGraph nodes. Allow nodes to declare dependencies using the new OptionalRequires attribute, which allow a dependent node's execution to continue if the artifacts failed to be created.

  • When assigning a job lease to an agent check if the required free disk space is available, otherwise assign a conform lease to the agent instead.

Bug Fix:

• Horde

  • Normalize IPv6-mapped IPv4 addresses to plain IPv4 for compute IP comparison.

  • Fixed shelved changelists not being deleted during an agent conform.

  • Dispose the Perforce PoolConnectionHandle when there is an exception during login.

  • Fixed when an agent lease is cancelled by a user the step will complete and upload the logs.

Insights

New:

• Unreal Insights

  • Added keyboard shortcuts for "Find [Max Duration/Prev/Next] Instance" of a timing event in Timing view and Timers view. By default: /,. for [Max/Prev/Next] in selected time range and Shift + /,. for global search.

  • Unreal Insights users can now create time, time range, and event-based annotations in Unreal Insight traces. The annotation data is saved in a sidecar.ini file that can be shared. This feature is to help individuals and teams with the performance analysis of trace files.

  • Added "Go to Frame" (Ctrl+G) and "Go to Time" (Ctrl + T) modals to timing insights. Allows navigation to Render Frame, Game Frame and time stamp.

  • Sort the analysis modules by name when displaying them in the session tab.

• Send OnConnect events on it's own thread. Refactored how events emitted during OnConnect is handled. Events can now be marked as "MaybeImportant" to treat events as important (without retaining in memory) when emitted during OnConnect, but as regular events when emitted elsewhere.

• Added support for tracing through a secured SSL socket. This works slightly differently from the standard socket connection, as the receiving side is expected to connect to the tracing application. The secure connection supports three modes:

  • Self signed certificate and authorization code.

  • Known certificate authority and authorization code.

  • Pre shared key (PSK). Methods of making certificates and authorization codes available on the connecting application is not provided by TraceLog. This needs to be transferred out-of-band.

• Update UnrealTraceServer to v1.24. This adds basic crash handling, and fixes memory leaks and crashes.

• Added API to UE::Trace to expose IsTailing, which allows game code to know if the tail buffer is in use. #[review] [at]fn-perfdev-server Added API call UE::Trace::IsTailing which returns true if the Trace Tail Buffer is active.

• Added "snapshot hitches" feature. This feature relies on the stats system to detect hitches. When a hitch is detected a trace snapshot and screenshot is written to the Saved/Profiling/Hitches directory. Frames are dumped into a directory for each process instance. Start tracking hitches by using in-game console command `snapshothitches -start` and disable by using `snapshothitches -stop`. Requires some stat group to be active, like `stat default`.

• Allow for crashes to contain a trace snapshot. Use cvar "CrashContext.TraceSnapshotOnCrash" to enable and "CrashContext.TraceSnapshotOnCrashTailSize" to set size of tail data to be written. Currently only supported on Windows.

• Add support for controlling max size when writing the tail buffer.

• TraceController now exposes target capabilities.

• Small increase to the time resolution timing shown in insights (without this, values near the low end of the automatic range have almost no precision - e.g. appearing as 1.2s).

• Added OnClose event for when a trace connection is severed.

• Added a MessagingInsights plugin, enabling visualization of UdpMessaging message summaries and lifecycles within Timing Insights.

• TraceLog now automatically emits regular statistics about Trace performance. This can help to analyze problems with Trace performance. They are visualized as counters in Timing Insights.

• Add bandwidth and percent value types for graphs and counter stats.

• Add a "panic mode" for TraceLog. This is triggered if the block pool is full and the TraceLog (worker thread or end frame pump) cannot process data fast enough. When panic occurs the process can continue without being affected, but tracing is no longer reliable and cannot be used for the remainder of the process lifetime.

Bug Fix:

• Addressing several UI/UX bug fixes in the new annotation feature.

• Module names may not contain network names.

• Fix flickering for channel tooltips in the trace control widget.

• Unicast trace status and channel status messages to reduce Trace Control network usage.

• Removed trace started notification from the Editor that affected the trace data.

• Add base file for Insights settings to enable settings persistent in Editor.

Framework

New:

• Level Streaming Persistence (Experimental): Added opt-in support for persisting actor states in a map's persistent level, persisting actor destruction by re-destroying, basic actor respawning (non-time-sliced), and game code hooks. These new features are opt-in and configurable through Project Settings > Level Streaming Persistence.

• Add * and -> operators to TInstancedStruct for convenience.

• ITF: Drop any active mouse hover capture prior to calling `BeginCapture()`. Fix issue where terminating hover cleared the wrong owner field.

• JsonObjectGraph now properly encodes Enums that are being used as Flags.

• Dynamic Loading Range Scaling option in World Settings leading to quicker PIE startup on large maps.

• Add support for interfaces in FWorldConditionContextDataRef binding.

Bug Fix:

• Apply const to query functions that do not perform mutating operations, so they can be used on a const UPrimitiveComponent.

• Added tick unregistration logic to ULevel::ClearLevelComponents to make sure that when incremental unregister is not permitted, tick functions are still unregistered from actors.

• Fixed crash in UBT when reporting Engine Files error.

• Fixed a crash when editing an actor when instances of that actor exist in cleaned up UWorlds.

Deprecated:

• LigthWeightInstances code marked as deprecated.

AI Debugging

New:

• Trace Based Debuggers

  • Refactored and moved TraceSessionsManager from ChaosVD Main changes:

    • Settings are now Attributes to assign/bind when creating the manager.

    • Sessions manager creation now requires explicit references since this is no longer setup as a group of related singletons:

    • Debugger trace runtime module.

    • Engine-editor bridge.

    • Trace module (TraceServices::IModule modular feature)

    • FChaosVDTraceSessionDescriptor replaced by UE::TraceBasedDebuggers::FTraceSessionDescriptor.

    • Moved DataStream related types to (FSessionStreamStatsUpdater, IRemoteSessionDataStream, FDirectSocketStream, FRelayDataStream, etc.) under namespace UE::TraceBasedDebuggers.

  • Replaced recording flag by the ID of the application instance that requested the active recording.

    • Allow recording controls to filter out sessions from the dropdown.

    • Fix message traffic issue by sending the Pong message only to the sender of the Ping (i.e., no broadcast)

    • RewindDebugger controls now filters out other Editor sessions.

    • Fix session naming issue with multiple local editor instances: The session name can only be replaced by "Local Editor" by the process handling the Pong message and not when generating that message since multiple editors can handle it.

• Rewind Debugger

  • Updated FRewindDebuggerTrack::GetStepFrameTimeInternal to use a scrub info struct providing more information to derived classes in order to select the best scrub time to use when using the stepping forward/backward buttons. VisualLogger track now allow users to jump directly to frames with events (i.e., skipping empty frames).

  • Added settings to control the desired transport mode for remote connections.

  • Added a new button to open the folder containing analysis files and one to delete all utrace files in that folder.

  • Added new virtual methods for runtime extensions to register new message types and handlers for remote connections.

    • Added new log categories widget to enable/disable verbosity filtering during recording and control the verbosity of each category (note that the initial implementation populates the "known" categories from the analyzed data of an active recording)

  • Added explicit methods to handle the local session recording and made sure that this functionality doesn't interfere with the other active sessions.

    • When auto-record on PIE is used we make sure to select the local session in case multiple remote sessions are available. Same when resuming or advancing one frame in PIE.

    • Fixed issue where users are not able to start recording while PIE is paused.

  • Added Auto-Scroll functionality.

    • Playback controls are now always available and will disable auto-scroll.

    • Manual scrubbing will disable auto-scroll.

    • Recording started on PIE will activate auto-scroll.

    • Resuming recorded PIE session will reactivate auto-scroll.

  • Added analysis opened/closed notification for editor extensions.

    • Updated some editor extensions to use RuntimeExtension instead when it was the intent (e.g., controlling traces)

  • Added support for remote sessions provided by TracedBasedDebugger/Analysis modules.

    • Updated toolbar to use RecordingControls.

    • Removed SaveTrace command since analyzed sessions are saved to disk by default.

    • Converted VLog filters from checkbox to toggles to allow users to set multiple ones without closing the menu.

    • GameplayProvider no longer filters out Server worlds.

  • Restore previous VLOG recording state when stopping traces.

  • Implement per-provider locking for RewindDebugger trace providers and migrate all call sites from session-level locks to provider-level locks to prevent deadlocks.

    • Add FProviderLock implementation to FAnimationProvider, FVisualLoggerProvider, FPoseSearch::FTraceProvider, FUAFProvider, FAnimNextAnimGraphProvider, FUAFAnimNodeProvider, FChooserProvider, and FStateTreeTraceProvider.

    • Replace FAnalysisSessionReadScope with FProviderReadScopeLock at all RewindDebugger track call sites (~60 files).

    • Replace FAnalysisSessionEditScope with FProviderEditScopeLock in all trace analyzers.

    • Replace Session.ReadAccessCheck()/WriteAccessCheck() with provider-level ReadAccessCheck()/EditAccessCheck().

    • Add missing ReadAccessCheck/EditAccessCheck to provider methods that were unprotected.

    • Optimize lock scopes to minimize hold time (cache data inside tight locks, move widget creation/asset loading outside).

    • Wrap Session.UpdateDurationSeconds() calls in FAnalysisSessionEditScope where needed.

  • Add configurable allowed class types filter to the Rewind Debugger target selector Replaces the hardcoded ULevel/UWorld child filter in the object selector dropdown with a configurable allowlist of class types.

    • Adds a new URewindDebuggerProjectSettings class (project-scoped, saved to RewindDebugger.ini) with a SelectorAllowedTypes array, defaulting to AActor.

    • Extends URewindDebuggerSettings (user-scoped) with a matching SelectorAllowedTypes array that can add types on top of the project settings but not override them.

    • The selector now filters by checking IsSubClassOf against the combined allowed types; an empty list falls back to allowing everything.

    • Renames URewindDebuggerSettings display name to 'Rewind Debugger (user preferences)' and fixes VLog settings to use its own localization namespace to avoid collision.

• Visual Logger

  • Introducing new defines to split functionalities: Recording, Rendering and Visualizer Tool.

    • UE_DEBUG_RECORDING_ENABLED: Indicates whether the UE_DEBUG_* macros will record the element (VisualLogger and/or insight traces).

    • UE_DEBUG_RECORDING_USING_VLOG: Indicates whether the UE_DEBUG_* macros will use the VisualLogger recording process to store entries and write to all registered output devices. Otherwise only insight traces are used.

    • UE_DEBUG_RENDERING_ENABLED: Indicates whether the UE_DEBUG_* macros will use immediate debug draw visualization.

    • UE_DEBUG_VISUALIZER_TOOL_ENABLED: Indicates whether the analysis of the recorded data is active and dedicated UI and tools should be compiled.

    • To maintain compatibility ENABLE_VISUAL_LOG will enable all three functionalities. Without UE_DEBUG_RECORDING_USING_VLOG we bypass most VisualLogger functionalities to log to the trace directly. Examples of disabled features:

      • CategoryAllowList

      • NavigationDataDump

      • DebugSnapshot

      • ClassAllowList

      • ObjectAllowList

      • Output devices.

  • Added opt-in functionality to apply LogCategories verbosity filter when recording. Can be controlled by:

    • Console commands: Vislog.ActivateVerbosityFilterWhenRecording and vislog.DeactivateVerbosityFilterWhenRecording.

    • Config Property `bUseVerbosityFilterWhenRecording` in VisualLoggerSettings.

• IMessageBridge

  • Add IsSubscribed(FTopLevelAssetPath) pure virtual to the base IMessageBridge interface so any bridge implementation can report whether it forwards a given message type.

  • FMessageBridge (standard) returns true unconditionally (PATHNAME_All).

  • Add FOnSupportedMessageTypesChanged multicast delegate, broadcast whenever the supported message types list changes (from RegisterExternalSupportedMessageType, InitializeMessagingSystem, or any path through ReInitializeMessagingSystem).

  • Add SetMessageBridge() to store an external bridge reference for per-type reachability queries.

  • Add CanPublishToNetwork that checks for a standard bridge (INetworkMessagingExtension modular feature) or queries the custom bridge's IsSubscribed for the specific type.

  • Gate SendPong on CanPublishToNetwork<FSessionPong>() to prevent ghost sessions when no bridge can forward Published messages back to the controller.

• SmartObjectComponent Uses GetActorDescProperties.

Bug Fix:

• Rewind Debugger

  • RecordingStarted is now called immediately once the connection gets established (not deferred to game thread) since the channels need to be enabled before the next game thread frame to not miss events.

  • Made sure that world times got reset before enabling trace channels from OnEnableRequiredTraceChannelsInternal virtual method.

• AI Blueprint Helper: Updated CreateMoveToProxyObject to make sure the controller is still a valid Actor that can be stored in a weak pointer.

• Visual Logger: Updated trace output device to handle entries larger than the maximum trace event size.

• Fix: GetSmartObjectBounds was getting the owner actor transform instead of the component one.

• Gameplay Debugger Replicator fixes to work with the MultiServerProxy. Gameplay Debugger Replicator used indices to replicate (which wouldn't necessarily match the other server). Now using names when available, Extensions are still by index.

• Config: Added ensure and recovery code when a config is created and the 'config' specifier is missing on the UProperty.

AI EQS

New:

• Added the bStripFromClientBuilds option to UEnvQuery, mirroring the pattern on UDataTable. This allows EQS assets to be excluded from client builds, since they are server-only AI queries.

AI Navigation

New:

• Mass Navigation

  • Added OffsetCornersFromBoundaries parameter to FMassNavMeshPathFollowTask to push wall-hugging corners away from walls.

  • Improved Mass navmesh path-follow end-of-path detection with combined distance and projection checks; also fixes a division-by-zero.

  • Added FAgentHeightFragment to additional Mass StateTree tasks (FindSmartObjectTarget, NavMeshPathFollow) that need a height to query the navmesh.

  • Added FAgentHeightFragment requirement to FMassNavMeshFindReachablePointTask so it can build a valid FNavAgentProperties for queries.

• Nav Mesh

  • Optimized Detour navmesh link memory by sizing the base link pool to actual usage (~30 MB savings on large maps); exposed bMinimizeLinkPoolSize and added link utilization stats to DumpNavMeshMemory.

  • Optimized navmesh vertex storage by packing vertices as tile-local float offsets (~50% memory reduction on vertex data); navmesh version bumped to 28 with automatic legacy-format upgrade on load.

  • Fixed misleading description and tooltip on ARecastNavMesh::bForceRebuildOnLoad.

  • Exposed ARecastNavMesh::AverageLayersPerTile and reduced its default value, saving memory in the tile pool allocation.

  • Skipped BVTree creation for navmesh tiles with very low polygon counts to save memory.

  • Added bDrawOnScreenInformation on ARecastNavMesh to toggle on-screen detailed navmesh information.

  • Optimized FRecastNavMeshGenerator::RemoveTiles to reduce a hang when many tiles are dirty simultaneously.

  • Nav Area:Nav Mesh: Added per-mesh custom NavArea support on UNavCollision (bUseSurfaceArea + AreaClass) so static meshes can apply custom walkable area costs during rasterization.

• Navigation System

  • Change to how Pawns without a PreferredNavData set work. This makes it so, if unset, that the Pawn will now only find and use NavData with matching CanFly values. This prevents ground-based Pawns from trying to use flying navigation data.

  • General navigation log improvements (clearer messages, better contexts).

  • Added diagnostic logs on AddNavigationSystemToWorld, OnWorldInitDone, GetWorldBounds, PerformNavigationBoundsUpdate, OnLevelAddedToWorld and ANavigationData bound changes.

• Avoidance: Added configurable side-bias threshold and right-side passing bias to Detour crowd avoidance.

• Added logs that record AsyncLoadLock state and increased verbosity in navigation tests to help diagnose intermittent failures.

• Added the navdata name to navdata registration logs. Added a log when navigation building is prevented by a navigation lock.

• Navigation: Exposed GetLengthFromPosition to Blueprints.

• Removed UE 5.5-era deprecated navigation code.

• Mass Avoidance: Mass avoidance gameplay debugger can now display entity radius when no collider is present.

• UEFN now dirties the package on navigation generation completion so changes can be saved.

Bug Fix:

• Navigation System

  • Fix data race in RegisterNavRelevantObjectInternal when using async nav data gathering. When bDoFullyAsyncNavDataGathering is enabled, FRecastTileGenerator::DoWork() runs on a worker thread and reads FNavigationElement fields via FNavigationRelevantData::SourceElement (a TSharedRef<const FNavigationElement>). Concurrently, the game thread can call RegisterNavRelevantObjectInternal (e.g. when a component is registered a second time) which overwrites the same FNavigationElement in-place through a mutable TSharedPtr. The root cause is that the repository stores TSharedPtr<FNavigationElement> (mutable) and overwrites in-place, while all other holders (navigation octree, pending updates, tile generator) hold TSharedRef<const FNavigationElement> to the same heap object, assuming immutability. Fix:

    • RegisterNavRelevantObjectInternal now allocates a new FNavigationElement and replaces the map entry via Emplace, instead of overwriting *ExistingElement. The old instance remains alive and unchanged as long as the octree or an in-flight tile generator holds a reference to it via SourceElement.

    • F Navigation Octree Controller::RemoveChild now compares children by FNavigationElementHandle (UObject + SubElementId) instead of TSharedRef pointer identity. This ensures that passing a newly-allocated element for the same navigation object correctly finds and removes the old entry from OctreeParentChildNodesMap.

  • Fixed reentrance in UNavigationSystemV1::RegisterNavData that could trigger when registration callbacks spawned new nav data.

  • Now waits for initial async loading to complete before triggering an automatic rebuild; new bWaitForAsyncLoadingBeforeBuildingNavigationAutomatically property controls the behavior (enabled by default).

• Navigation

  • Fixed an intermittent issue where off-mesh connections could be missing after navmesh generation, depending on the order tiles were processed.

  • Fixed an issue where deleting the last NavMeshBoundsVolume in a level could leave the navmesh in a null state, causing subsequent property edits to trigger an ensure. The navmesh is now preserved when there is no longer anywhere to build navigation, and any stale tile data is cleared instead.

  • Fixed an issue where traveling to a level that had a navigation bounds volume but no saved navigation data would leave the navmesh empty, preventing NPCs from pathfinding. The navigation system now correctly triggers an async rebuild when it spawns fresh navigation data at runtime.

  • Fixed an issue where NavLinkProxy actors used by Child Actors did not work correctly on startup in Play in Editor.

  • Fixed an issue where area costs were not set before NavLinks were snapped during level serialization.

  • Fixed an issue where a NavLink Proxy could fail to register when the navigation system was not yet initialized.

  • Fixed several issues with directional generated NavLinks:

    • Fixed an issue where generated NavLinks were not applied to the correct layers when directional links with different areas were present.

    • Fixed an issue where directional NavLinks were not height tested.

    • Fixed an issue where reversed NavLinks were stored incorrectly. Directional up links are now stored in reversed order to keep them with their associated down link, and the owner position is now correctly validated to be contained by the tile when handling asymmetric border sizes.

  • Fixed an issue where the AllowLinkGeneration console variable was not enforced uniformly across all navmesh generation paths.

  • Fixed an issue in Recast where generated data was not placed where the caller expected it.

  • Fixed an issue where EncompassesPoint did not work correctly on ANavMeshBoundsVolume.

  • Fixed an issue where spline points were generated in world space instead of local space, causing the world transform to be applied twice.

  • Fixed an issue where a component could remain in the navigation octree after being unregistered.

  • Fixed an issue where navigation bounds were not cached correctly before being registered, which could trigger an ensure.

  • Fixed an issue where undoing or redoing changes that required a navmesh rebuild were not being detected correctly. The navmesh now responds to PostTransacted notifications to catch these changes.

  • Fixed crash in AddNavigationSystemToWorld during Sequencer undo/redo on transient worlds.

  • Crash Fix: [Navigation] Fixed a crash that occurred when an extreme JumpLength value was set in a NavLinkJumpConfig. The inflated tile border size could cause an allocation failure or integer overflow during navmesh generation. A warning is now logged when the border size exceeds the tile size, and tile generation is safely aborted if the heightfield size would overflow.

  • Fixed ensure when editing NavigationSystem config properties in Project Settings by skipping CDOs in FEditorViewportClient::OnObjectTransacted.

• Nav Link

  • Fixed multi-config registration for generated navigation links.

  • Fixed an ensure in ComputeCustomLinkBounds.

  • Fixed crash in ANavLinkProxy::GetComponentsBoundingBox.

  • Fixed an ensure that triggered when undoing a NavLinkJumpConfig change that had a LinkProxyClass set.

• Nav Mesh

  • Fixed navmesh loading quantization factors not matching newly-updated CellSize settings (occurred when settings were changed via config files outside the editor).

  • Detour dtNavMeshQuery::queryPolygons now handles out-of-memory conditions gracefully.

• Newly created Blueprint NavArea classes are now registered via PostCDOCompiled so they take effect without a reload.

• Automated Testing: Fixed an issue where AutomationLoadMap started Play in Editor immediately after loading a map, copying an empty navmesh into the PIE world before the async editor rebuild could finish. PIE startup is now deferred until the editor navmesh finishes building.

• Fixed multithreaded access on FLandscapeHeightfieldCollisionComponent::CachedHeightFieldSamples reachable through INavRelevantInterface::GatherGeometrySlice.

• Prevented a crash when exporting geometry containing too many triangles for navmesh generation.

• Fixed navigation data not being removed when using One File Per Actor (external actors).

• Fixed "Build > Build All Levels" leaving the navigation system in a broken state.

• Fixed navmesh being out of sync with unloaded objects in World Partition maps when Build Paths is run.

• Ensured the map package name is known before building a World Partition navmesh in the editor so the map can be reloaded afterwards.

• Fix FCompositeNavModifier::CreateAreaModifiers not taking into account FKSphylElem internal rotation Fix FCompositeNavModifier::CreateAreaModifiers not using the proper length for a FKSphylElem Fix FAreaNavModifier cylinder constructor not handling non vertical cylinders. This will now fallback to a box if the cylinder is not vertical.

• Fixed ai.debug.nav.DirtyAreaAroundPlayer debug command not working on the server.

AI State Tree

New:

• State Tree

  • Property Binding Utils:

    • Added a cvar to control automatically removing failed-to-resolve source binding path bindings or not for State Tree. Default true(old behavior). Missing target struct binding path bindings or failed-to-resolve invalid target binding path bindings will always be removed automatically. Missing source struct binding path bindings will never be removed automatically.

    • Fix up State Tree Editor Bindings when UserDefinedStruct, Blueprint, or UObject gets reinstanced from live coding. Cache dependency to filter out state tree assets.

    • Correctly gather dependent structs for compiled property bindings.

    • Use struct's authoraritive version when resolving indirections.

    • Bindings display friendly name for UserDefinedStruct properties.

  • Added option to override start state by gameplay tag when starting running the tree. States corresponding to the same gameplay tag will be searched through in breadth first order.

  • Do not create an instance data storage for shared instance data when no shared data exists. It reduces the runtime memory footprint. Each thread that access state tree increments a counter. That counter is static and is valid for all state tree assets. That means each state tree asset uses a ?number of threads? amount of storage, even if the state tree asset is not intended for threading.

  • Add a queue and asynchronous state tree compilation. The compilation is always on the game thread. The state tree asset is compiled "just in time" the first time it is used by the game. The features are disabled by default.

    • With cvar StateTree.Compiler.EnableQueuedCompilationOnAssetLoad, the public step will be compiled synchronously when the asset loads, and the internal steps will be queued for later. Without the cvar enabled, the previous behavior is maintained. The compilation of the public and internal steps are compiled synchronously.

    • With cvar StateTree.Compiler.EnableQueuedCompilationWhenAssetDirty, the asset is queued for compilation as soon as it is modified in the editor.

    • With cvar StateTree.Compiler.EnableCompileSynchronouslyInPIESession, all queued assets are compiled synchronously before a PIE session starts. While in PIE, assets will not be queued. They are compiled synchronously.

    • With cvar StateTree.Compiler.NumberOfQueuedCompilationPerBatch, you control how many state tree assets compile per ticking loop. To deactivate, set to 0. Every tick, the engine will compile NumberOfQueuedCompilationPerBatch queued state tree assets, including the dependencies.

  • Refactored and fixed incorrectly accessing subtree parameter, global parameter and global instance when it exists in a parent frame multiple levels above.

    • Now we cache corresponding Parent Frame IDs for accessing global parameter and global instance in temporary data, and cache corresponding index base for accessing global parameter and global instance in active instance data.

    • No longer sets Subtree and Global Parameters in UpdateInstanceData because they have already been set when creating the frames and they don't change. We update ActiveInstanceIndex, GlobalInstanceIndex and GlobalParameterIndex in UpdateInstanceData.

  • Enable evaluation scope by default. Tell the cooker about the cvar that can affect the compilation result.

  • Implement EvaluationScopeInstanceData for condition's EnterState/ExitState/StateCompleted.

  • Remove STATETREE_POD_INSTANCEDATA in favor of UE_STATETREE_CONSTRUCTED_TRIVIALLY_COPIED_NO_DESTRUCTOR_INSTANCEDATA or UE_STATETREE_ZEROED_TRIVIALLY_COPIED_NO_DESTRUCTOR_INSTANCEDATA. Properties that are initialized in-place need the constructor. ScriptStruct instances constructed from script (BP or StateTree instance data) are memset to 0 by default. The POD has a different meaning in C and CPP (pre 2020). It is preferable to use the more descriptive term "trivial" to identify types that can be trivially constructed and copied.

  • Allow creating new StateTree assets from linked asset dropdown.

  • Create UE::StateTree::EComparisonOperator to replace EGenericAICheck from the AIModule. This is an effort to make StateTree not depend on AI modules and make it generic for everyone to use.

  • Implement drag and drop for state tree state nodes Extending the existing drag and drop structure to support dragging state's nodes around. By default, dragging a node moves it to another state (literally moving) keeping the bindings valid if any other node references it's properties. By holding Ctrl key while dragging, the behavior alternates to copy instead move.

  • Added FStateTreeExecutionContext::GetCurrentlyProcessedStateSelection.

  • Prevent linked state override when bindings could use invalid data.

  • Hide utility consideration when they are not usable. The parent needs to have a selection behavior that uses them.

  • Access ExecutionRuntimeData from async task.

  • Add a color bar that matches the category color.

  • Chained Property Ref from multiple parent frames above can now correctly fetch source data. Now we fetch the associated parent frame that stores GlobalParameter or SubtreeParameter by FrameID.

    • Disabled using PropertyRef in ExternalGlobalParameterData.

    • Deprecated and refactored FindFrame.

    • Deprecated and refactored FStateTreePropertyRef::GetMutablePtr.

    • Deprecated StateTreePropertyRefExternalHandle.

  • Execution context uses a view instead of the property bag. Deprecated the property bag version. This is a step to use a permanent script struct instead of the transient property bag.

  • Add menu action to select the transition's target state.

  • Add new transition targets. Parent, NextParent, and NextSelectableParent. They are reconciled at compile time and work similar to NextState and NextSelectableState.

  • Added a button to remove all elements from the tasks, evaluator, condition, transition lists.

  • Added a button to remove all properties from the property bag.

  • Move the temporaries before it is used in EnterState. Previously, they were all moved in UpdateInstanceData. It caused a problem if an async task requested the instance data before the state was added to the Frame. Usually, that could not happen, but global nodes (task and evaluator) can be started temporarily. Their EnterState is called, and they will only be added to the frame when the linked state is added.

  • Add a global callback and a callback on the editor extension to validate the state tree asset. The validation occurs when the asset loads, and before it compiles. The user can use the callback to modify the editor data before the asset compiles.

  • Add a condition to compare a single Gameplay Tag against another.

  • Capture condition / task / utility names in ST rewind debugger.

    • Add IStateTreeDebugInfoProvider to provide editor data driven debug info when possible, with default runtime only debug info as fallback.

  • Add ability to mark a transition for reselection.

• Added Experimental State Centric View.

  • Disabled by default. Enable via `StateTree.Editor.Experimental.EnableStateCentricView`

• Show number of enter conditions / tasks / transitions / considerations / parameters in details header.

  • Also show utility weight if it's just a weight.

Bug Fix:

• State Tree

  • Recursively Trigger transitions from parent frame when a subtree completes. This solved issues caused by When hit the max iteration, the execution context will lose track of info in the next frame when continuing transition processing from the subtree completion.

    • Added unit test to verify this.

  • Fixed an issue where events are not visible to the state required event to enter from on completion transition. Fixed an issue when a subtree completes, broadcasted delegates and events will be incorrectly cleared.

  • Remap state event IDs when cut/paste states Preserve and remap state event IDs during copy/paste to fix compilation failures when a pasted state has nodes that bind to required events on the state's enter conditions.

  • Fix crash in Enum Compare Condition when resetting right field default value.

  • Events added during TriggerTransitions will be queued and only reset in the next TriggerTransitions. This allows multiple parallel trees to share event with each other, and fixes events sent in task on enter won't be accessible in the next tick in parallel trees.

  • Prevent Linked Asset override at runtime when the Linked State Parameter is binding source or binding target. This includes the parameter is bound to something else, a node is bound to the parameter or a node's appended property function is bound to the parameter.

    • Use an additional flag for override. Cache the flag during Compile for runtime check.

  • Disabled Promote to linked state parameter option.

    • Fixed an issue where property cannot be promoted to state parameter if state parameter is empty.

  • Disable promoting to state parameters if the state is a linked state.

  • Correctly Scope Start and Stop global tasks debug phase. Global tasks are entered/exited hierarchically and each frame should have its own scope to reflect the correct ordering.

  • Fixed an issue where transition delegates weren't triggered if the delegate was broadcasted during the transition tick.

  • False positive circular reference while compiling state tree asset async. This occurs when A refers to B and C. And B also refer to C.

  • Fix issue with override linked asset when the state needs reentrance. It used to pick the new override for sustained transition instead of picking the previous override. Add unit test for 2 repro of that same bug.

  • Make status not trivially copiable. The inner pointer might point to itself. Unreal container do use trivially allocated structure. They do not call the move or copy constructor.

  • Fixed states order is reversed when inserting before another state in the editor.

  • Remove the temporary instance data once it has been consumed. Previously, all temporary instance data was moved in UpdateInstanceData. Now, they are only moved when the task starts.

  • Only append temporaries when they will not be copied later in Enter. This fix issue introduced with.

  • Add callback to get the asset registry tags from the editor data. Use the editor schema to always have a valid schema in case the compilation fails.

  • State Tree Debugger: Added support for breakpoints in statically linked assets (i.e., not dynamic overrides).

    • Asset no longer get dirty when adding/removing breakpoint.

    • Select the first available instance in the debugger view when analysis starts.

  • Property Binding Utils:[State Tree] BindingView rework.

    • Added error icon for Missing struct.

    • Added error icon for binding path failed to resolve.

    • Click on Binding struct will traverse to the corresponding struct property row.

    • Click on Binding path will traverse to the corresponding property property row.

• Fix issue where we use stale linked state tree override whenever there is a change overrides in the middle of the current context's execution Since we are only allowed to set linked state tree overrides before we start context's execution, it is not possible to update it when an override changes sometime between the start and the end. To fix this we use a delegate to fetch current state tree overrides from external source.

• Fix rename failing on to be discarded ST editordata schema object.

Blueprint

New:

• Blueprint "enable/disable" node submenu options moved out of experimental. Right-clicking on a node with exec pins will now present options to enable or disable the node, without having to opt-in to this behavior.

• Blueprints: Make FVector2D default values work when exposed on spawn on the Construct Object BP node.

• Added simple counter to ensure if too many Blueprint async actions are created. The number of allowed actions can be set using the console variable `bp.MaxAsyncActionCount`. Set the number to <= 0 to disable the ensure.

• The Blueprint editor scripting API has been greatly expanded. For editing Blueprint graphs use the new BlueprintGraphEditor. For general Blueprint editing see the new functions in BlueprintEditorLibrary. If you're unfamiliar with these APIs consider running help(unreal.BlueprintGraphEditor) or help(unreal.BlueprintEditorLibrary) in your python console.

• Expose FPerPlatformBool to Blueprints to match Int and Float.

• Find in Blueprint: Will now search keys in the default key-value pairs in Blueprint Map variables. Previously only Map values were searchable.

• Struct Utils: Add helper functions to generate a UserDefinedStruct from a property bag. Property Bag are great when used internally the same package. It can cause issue when there's a reference outside the package. UserDefinedStruct are better at handling those.

Bug Fix:

• Fixed Blueprint function local variables being allowed to have the same name as member variables, which led to default value inheritance problems. Name validation is properly applied now when naming local variables. Name collision was already properly checked for member variables.

• Fixed crash when loading Blueprints with ComponentClass overrides.

• Fixed crash when deleting a character Blueprint and anim Blueprint at the same time.

• Fixed crash when pasting a component into a Blueprint.

• Fixed ensure when changing the class of a scene component.

• Structure assets will no longer causes crashes if deleted when they are used as member variables in Blueprints.

• Change K2Node::GetBlueprint to possibly return null (expected by most callers), and add GetBlueprintChecked for the old behavior.

• Fix several Blueprint editor crashes that would happen when recompiling at an unexpected time.

• Fix crashes when trying to reparent a Blueprint to a temporary class like a python wrapper, these are no longer shown as an option.

• Fields and properties associated with transient, non-native uclasses are no longer shown in the Blueprint context menu, as when placed in a graph they will not be able to resolve themselves when the asset is loaded.

• Fixed issue looking up default values for the root component when it is named DefaultSceneRoot.

• Fixed crashes in FBlueprintActionFilter::IsFilteredByThis.

• Component reference picker improvements: Allows picking components in the Blueprint editor.

• Fixed one cause of the prolific "PinHelpers::UnresolvedPins.Num() == 0" warning message.

• Fix bug where drag and drop could create an invalid floating point node.

• Nested split pins no longer cause data loss or assertion failure when their backing schema (Struct or Function) is changed.

• Correctly warn about trying to delete in-use local variables.

• U Subobject Data Subsystem::AddNewComponent will no longer crash when adding components without an explicit Blueprint context.

• Component subobjects tagged as RF_ArchetypeObject now have their subobject flags conformed, forcing RF_Public and consequently preventing 'linked to private object' error.

• U Blueprint Editor Library::GetBlueprintAsset now looks for adjacent UBlueprint objects, e.g. if a Level asset is provided as the object to get the UBlueprint from.

• Fix issue where properties like skeletal mesh would be reset after Blueprint duplication.

• Fix several editor crashes when trying to load invalid Blueprint assets.

• Fix crash when trying to set a local variable named the same as a replicated property.

• Fix issue where copy-pasted Blueprint nodes would no longer be pure.

• Fix bug where data assets made from Blueprints had the NativeClass asset registry tag set to the Blueprint instead of the parent native class. This will be fixed the next time those assets are resaved.

• Fix bug where undoing a child actor component deletion could create duplicate actors.

• Fixed a bug where changing a UUserDefinedStruct used in an FInstancedStruct property of a UDataTable row, would not re-instance the structs (as they do in non-UDataTable cases), causing data table details panels to crash trying to read new fields in the now-outdated instance memory.

• Fix missing native/instanced struct value data on runtime-spawned BP actor types with "Generate optimized Blueprint component data" enabled.

• Fix bug where Child Actor Class could not be set back to none in child actor components.

• Fixed Blueprint default properties with custom property customization not using the correct IsEnabled value in certain cases.

• Fix crash trying to compile a variable set mode pasted from another class.

• Struct Utils: Fix dirtying and recompile property bags when a UserDefinedStruct is modified.

• Fix Set Fields Blueprint node to accept non-const reference parameters.

• Output pins on Blueprint result nodes are once again validated for uniqueness when being edited.

Blueprint Compiler

Bug Fix:

• Blueprints are now compiled in the order their class taxonomy will define, rather than the one they currently define - this fixes crashes when compiling Blueprints after changing their parent class.

• Macro nodes no longer raise unsupported Blueprint changed notifications during compile, fixing crashes when compiling some Blueprints with complicated macros.

• Blueprints loaded for diffing will no longer attempt to compile before PIE, even if they have been marked as dirty.

• Guard against potential attempts to reinstance non-Actor objects with an invalid outer.

• Fixed rare non-determinism in Blueprint generated bytecode caused by text values that matched their default string.

• Blueprints that are in a dirty state because they are using a Struct that has been modified are now automatically recompiled on save.

• Fixed rare crash when compiling Blueprints with invalid functions.

Blueprint Runtime

Bug Fix:

• TScriptInterface now only produces a valid value if the provided object implements the specified interface (either as a Blueprint class or natively).

• Fix race condition between UPrimitiveComponent::Postload and FObjectInitializer::InitProperties when instantiating a BP while its CDO is completing its initialization on the Gamethread.

Gameplay

New:

• Input

  • FInputDeviceScope refactor and deprecation.

    • Deprecation the FInputDeviceScope type. Instead, you should use the new FInputDeviceRegistry type instead. This registry is thread safe and removes the need for Input API's to wrap every event with a FInputDeviceScope, which is very error prone and confusing.

    • The FInputDeviceRegistry should be populated any time a new device is *connected*, and has an assigned FInputDeviceId. This way, the device name/type is evaluated once, upon connection, instead of every single tick.

    • Effectively make the FInputDeviceScope no-op unless the UE_USE_LEGACY_INPUT_DEVICE_SCOPE define is set to 1. Users can define this in their Target.cs file if you still depend on FInputDeviceScope.

    • For forward compatibility, when a device is connected (IPlatformInputDeviceMapper::Internal_MapInputDeviceToUser is called) if there is not already a new device registry entry available, we will attempt to populate it from a device scope that is available.

    • Enforces a better contract for the FInputDeviceId to each platform and makes them all consistent.

    • Linux and Mac were completely missing FInputDeviceScopes, and they now have a FInputDeviceRegistry call to resolve that.

    • In CommonInput and the Input Device Subsystem, utilize this new FInputDeviceRegistry instead of FInputDeviceScope's. The names of the types for common input should be the same, and do not require asset updates. Same with the hardware device identifiers.

  • Add some debug data to player input available in non-shipping and test builds behind the UE_PLAYER_INPUT_INCLUDE_DEBUG define.

• Mover

  • Updated README documentation, accounting for bugfixes and feature set changes.

  • Populating/refreshing shared settings in OnRegister of a Mover component so we guaranteed have valid shared settings.

  • Reworked kinematic simulation to be separate from MoverComponent, as a stepping stone towards using Mover with non-Actors.

  • Removed unsupported PhysicsMover / NetworkPhysicsLiaison code from Mover plugin, in favor of ChaosMover plugin.

  • Support perching radius threshold so characters can be configured to fall off ledges if they're only partially supported.

  • Add MixMode parameter to Play Mover Montage BP node, for control of how the root motion mixes with other movement sources.

  • Added a BP-friendly method of querying for the floor so it's easier to include in Blueprinted movement modes.

  • Exposing the movement base's transform deltas through an update event, in support of motion matching while on a moving platform.

  • Implementing MovementInterface on UMoverComponent and using the interface in encroaching checks so we also use the movementcomponent path and properly check encroachment when using a mover component.

  • Evaluating Mover instant effects after modifiers are added/removed. This helps crouch apply properly without any depenetration. Also adjusting the stance modifier to always adjust capsule location when modifying capsule size.

  • Add residual velocity when leaving a movement base.

  • Reworked kinematic based movement to eliminate drift on rotating, tilting platforms similar to heaving boats.

  • Adding a projection setting to nav walking modes that allows users to specify what geometry to project to in relation to the navmesh. Also adding proper support for move off navmesh option for NavWalkingMode.

  • Adding an ensure to navwalking modes noting that the bAllowClientSideNavigation navigation system setting needs to be true if nav walking mode is running on a client so a navmesh is available for nav walking to use. This is the case when running a pawn in nav walking mode with Fixed Tick Forward Predicted Network prediction simulation.

  • Added helpers for common rollback blackboard entry creation cases, and current-frame-only persistence option.

  • Added simulation context as a parameter to core Movement Mode functions.

  • Added query for the next anticipated movement mode.

  • Adding RVO interface to NavMoverComponent to support detour crowd avoidance. Note, this is not force based RVO avoidance. Also adding some example content to mover examples to show this functionality.

  • Remove unnecessary falling check that will never get hit in movement utils.

  • Added prediction mode support for the rollback blackboard, so trajectory prediction flows can read/write with it without affecting the true simulation state.

  • Add USimpleFlyingMode to simplify the process of making a Blueprint driven flying mode.

  • Made all default movement modes function with non-capsule shapes as long as they're reasonably symmetric within the movement plane.

  • Added support for single-entry values in the rollback blackboard, along with a policy to ignore rollbacks.

  • Mover, ChaosMover: Added more time step information to event data, allowing differentiation on factors like whether a resimulation is occurring.

  • Mover, ChaosMover: Added more contextual information to time steps and events.

  • Network Prediction and Mover: Expanded ShouldReconcile to allow the option of deferring to a simulation driver function.

  • Mover Examples: Adding example map to help test scaling to larger NPC counts.

  • Add Mover Methods to query if a tag exists. Add Mover FSM nullptr checks.

• Level Streaming Persistence Plugin

  • Exposed persisted property configuration to editor as DeveloperSettings.

  • Exposed the LevelStreamingPersistenceManager's SerializeTo and InitializeFrom functions to Blueprint. SerializeTo now updates persistence data for visible levels, ensuring that the in-memory cache is up to date for all levels of the map before serializing to a binary blob.

  • Now shows warning in editor when a persisted property is missing editable specifiers.

• GAS

  • Add RemovalPolicy to OnApplicationGameplayEffects, incorporated in AdditionalEffectsGameplayEffectComponent.

    • Use case: Control life time of external applied GE through GE that applies it conditionally. I myself have noticed this before, and I've seen bugs in the past from designers not understanding that a GE applied through a GE controls its own lifetime by default, they implicitly assume it will be removed when the effect which applies ends.

    • Added support for removal policy, following a very similar pattern to Granting GAs through a gameplay effect component (You can cancel / end the GA when the GE granting the ability is removed).

    • Added EGameplayEffectGrantedEffectRemovalPolicy enum (GrantedEffectControlsOwnLifetime, RemoveGrantedEffectOnEnd).

    • Added stack count to remove field to conditional gameplay effect.

    • OnActiveGameplayEffectRemoved removes any on-application effects whose policy is RemoveGrantedEffectOnEnd.

    • Added content validation: Error if RemoveGrantedEffectOnEnd is used with an Instant owning GE or an Instant granted GE Updated AdditionalEffectsGameplayEffectComponent to support controlling lifetime of granted GEs.

  • FActiveGameplayEffectHandle now holds a reference to its Owning AbilitySystemComponent rather than using a Global Map.

• Remote Objects

  • Introduced AActor::GetPreferredRemoteServer to allow Actors to migrate together (e.g. Controller depends on Pawn's Location).

  • Fixes that allow parts of the AbilitySystemComponent to work with object migrations and multi-server proxy.

• Cameras

  • Make playback mode only affect whether a GPC component writes to the output component Don't make it affect whether a standalone camera system is created or not. This makes it easier to manage, and easier to understand for the user.

  • Some errors and warnings shouldn't be reported when running editor previews.

  • Rename AutoActivateForPlayer to DefaultPlayer, and simply always use that unless anything else is specified.

  • Add "playback mode" to the GPC components This allows GPC components to be recorded by Take Recorder. The output camera component is also recorded, and upon playback, the new "playback mode" option can be enabled (similar to how physics should be disabled on recorded actors). This lets the output camera component be animated by the recorded keyframes, without the GPC system interfering.

  • Add a sprite icon to GPC components This makes it easier to locate the GPC component in the scene when the output camera is offset from it. The sprite is hidden when the output camera is close or on top of the root location.

  • Allow using an "output" camera component created in the parent actor.

    • Actor components cannot create visible/editor-friendly children components themselves. Component hierarchies need to be created by the actor. This change moves the creation of the "output" camera component to the parent actor.

    • The GPC component only creates it if they can't find one created by the actor, which can happen if the GPC is inside another actor who doesn't know about all this, such as a character pawn or any other Blueprint. The user can still get this output camera component to be visible by creating it themselves and parenting it under the GPC component.

    • Since this effectively changes the output camera component from a "hidden" implementation detail to an "official" component of the actor, it would now show up in the Details View of the actor by default, cluttering up the UI with irrelevant properties that get overridden by the camera system evaluation. So this change also tweaks the categories and metadata on a few properties to make sure this component is hidden from the actor's Details View.

  • Expand documentation and add UI min/max settings to the field of view node.

  • Add explicit checkboxes to the lens parameters node Instead of specifying zero or negative values to indicate that some property should be ignored, there are now explicit checkboxes to enable/disable each lens parameter.

  • Add support for first person view.

    • Add new properties to the camera pose for 1P views.

    • Add a new 1P node to set those properties.

  • The node parameter detail customization now supports several property metadata like min/max values or units.

  • Add option to run camera directors and Blueprint camera nodes in editor.

  • Add action that aims at an actor with optional bone/socket.

  • Add a time-out property to camera actions Also simplify a bit how actions get cleaned-up, and the properties that need serialization.

  • Extract most of the "Aim At" action logic into a base class to make it easy to create other types of aiming actions.

  • No longer finds referenced objects from too many packages when gathering director usage The StateTree and Blueprint directors figure out what camera rigs and proxies they use by simply looking at referenced objects up to a certain distance.

    • However, this reference gathering was a bit too heavy handed. This change skips compiled packages, and adds an option to not explore objects of certain classes. This helps drive down the amount of referenced rigs and proxies shown in the "family shortcuts" in the editor (which showed seemingly unrelated assets).

    • It also fixes a bug with camera assets being dirtied on PIE because they would find new rigs to add to the default parameters when upgrading old data to the new interface.

  • Improve debug info for player controller/view target setups Add information about viewport size and aspect ratio.

  • Add screen-space framing option on the Aim-At camera action.

    • Adds a Target Framing property for where to frame the target on screen.

    • Use the new 2-bone IK function that takes into account an offset from the centre camera aim.

    • Improve the debug rendering a bit with extra information about the aiming.

    • Change the default lock-on tolerance to be a bit looser.

  • Remove GetTargetAngles and use proper projection/unprojection for all of the framing nodes' logic.

    • Make the dolly and panning nodes use projection/unprojection for computing how to recompose their shots.

    • Add more utility functions for projection/unprojection.

    • Make the projection/unprojection functions handle non-default aspect-ratio axis constraints.

    • Fix some issues in GetEffectiveFieldsOfView where it didn't correctly account for non-ideal aspect ratios.

    • Remove FCameraFramingMath which isn't used anymore.

  • Move the CameraPose-to-MinimalViewInfo code for easy re-use.

  • Add icons for Camera Rig Actor and Component.

  • Remove extra root node event API Reimplement the evaluation service's `OnRootCameraNodeEvent()` API in terms of the existing event that exists on the root node evaluator. This removes a bit of core API that wasn't needed.

  • Make the easing blend type a BlueprintType.

  • Update unit tests following changes to camera assets.

  • Fixes and improvements to the interface parameter panels.

    • Better default names for newly added parameters.

    • Support keyboard shortcuts for renaming and deleting parameters.

    • Add a button to delete selected parameters.

    • Properly refresh the list of parameters when undoing/redoing an add or delete.

  • Clean-up and improve handling of driven camera node parameters and multi-level prefabs.

    • Unify a bunch of code handling reflection-based node parameters vs custom node parameters (those obtained through the `ICustomCameraNodeParameterProvider` interface). Now there's the `FCameraNodeParameters` class that can build a list of available parameters on a camera node. This dramatically reduces the code in the Camera Rig builder class.

    • Fix some issues with multi-level parameter overriding, such as when an exposed parameter is re-exposed a level higher. Also, automatically flag connected prefab parameters as "overriden" on the prefab camera node to make sure those overrides are taken into account.

    • Rename some properties on custom parameter infos and interface parameter objects to be a bit clearer: "ParameterType" should be only for the parameter definitions, to specify if a parameter is "blendable" or "data". We should use "VariableType" for the type of variable to use in the variable table.

    • Simplify some of the parameter override helper code and remove unnecessary helper methods.

    • Add some unit tests for multi-level prefabs.

  • Add ways to parameterize post-process settings.

  • New "aim-at" camera action This action aims the current active camera rig instance towards a given target. It has options for keeping the lock on the target indefinitely until the action is stopped. The code for IK-aiming and other rotational corrections has been refactored so it can be used in the new action too.

  • New "lock user input" operation This operation locks user input for one frame.

  • Make value interpolators into constructable objects in Blueprints.

  • When a Boom Arm or Spline Orbit node doesn't have an input node, use a Driven Control Rotation node Before, these nodes were handling input themselves by querying the Control Rotation themselves. Now they use the seemingly better Driven Control Rotation logic. Also implement missing serialization of the boom arm length interpolator in the Boom Arm node.

  • New camera action service Camera actions are ways to execute operations on one or more running camera rig instances. They effectively "wrap" the root node evaluator for a camera rig, allowing arbitrary logic to be run before and after a camera rig evaluates. Camera actions also come with a few built-in options, such as the ability to clone themselves when a new camera rig activates, allowing a particular operation to persist over a long time.

  • Expose the blend type as a data pin on the easing blend node.

  • Make separate "getter" nodes for camera parameters, describe their connections in more general way.

    • Camera parameters were previously objects that doubled as their own node. This prevented driving two or more camera properties with the same parameter. This change removes the "node" aspects from camera parameters and adds a new "getter" node for that. The "getter" nodes point bac to the parameter they represent.

    • Previous data is gracefully upgraded for camera parameters that were present as nodes.

    • Since parameters may be connected to multiple pins, we can't determine their default value from that anymore, so the parameter has its own value now, a bit like variables in Blueprint. This changes a few things regarding the build process. A new customization class allows showing that default value in Details View for the user to set. Other parameter options (like "pre-blended") are removed from the list-view in the parameters panel: Parameters are now meant to be tweaked in the Details View.

    • Parameters can be added in transition graphs, for driving properties on blend nodes and such. A new base schema class provides support for this (a lot of its code is moved from the the camera node tree graph schema).

    • Actions for adding or auto-wiring parameters are changed accordingly (they now deal with the "getter" node mainly).

  • Make the search feature in camera editors based on the edited graphs and not the underlying object model Previously, searching through camera node or transition graphs was done based on the underlying object trees. Now, we more simply search the graphs that have been created out of these objects (thanks to UObjectTreeGraph). This makes it possible to get search results that are only indirectly related to the underlying data model, such as extra nodes and pins that show up in the editor.

  • No longer renders two debug infos when a GPC camera manager is running with a nested standalone GPC camera component Since the camera manager and the view target were both considered as the site for the "default" camera system, the camera debugger would end up drawing them on top of each other. Now we only consider the view target as default if the camera manager doesn't already run a camera system itself.

  • Activate and deactivate the output camera component along with its parent This fixes problems where a deactivated Gameplay Camera/Camera Rig component is still picked up by the engine when its owning actor is set as the view target, even though there's another active camera component on that actor.

  • Add option for freezing previous camera rigs when activating a new one.

  • Unify how Guids are generated for various assets.

  • Occlusion material node now supports skinned meshes and attached components.

  • Make sure components' parameter overrides are up-to-date with the referenced asset Update parameter overrides struct when starting evaluation, and on cook.

  • Add parameter GUIDs as tool-tips in the interface parameters panel.

  • Auto-rotate input node now supports going towards a zero rotation.

  • Boom arm node now supports additive rotation mode.

  • Improve how we apply parameter overrides from asset references Remove the need to keep the cached copy of the parameter overrides to detect changes: instead, just compare the new override values to the values found in the variable and data tables.

  • Add basic natvis support for the context data table.

  • Add easing blend node.

  • Make the boom arm and collision push node evaluators extensible.

  • Clean-up how components and player managers interact Simplify the camera component:

    • It now has an option to either run its own camera system ("standalone" mode, which is the default) or only run a camera evaluation context.

    • Remove some of the old code that attempted to handle a mix of both cases (such as with the non-immediate deactivation code) Simply the player camera manager:

    • Now anything that is set as the view target is run as a "blackbox", whether it's an arbitrary actor or vanilla camera actor or procedural camera (in which case it's better to use the aforementioned "standalone" mode).

    • To use fancier features such as blending or children directors, the procedural camera must be activated using dedicated new methods such as "Activate Gameplay Camera". Other clean-ups:

    • Move and improve on all the methods to activate/deactivate rigs and rig modifiers, and start/stop shakes.

  • Add Blueprint function for checking the validity of a shake instance ID.

  • Cleanup live-edit node listeners after a GC pass.

  • Make perlin noise use cubic splines by default This fixes undesirable "mini-pauses" in the middle of some curve segments when using a standard smooth-step interpolation.

  • Add more Blueprint methods to the components for managing persistent rigs and shakes.

  • Change how auto-build for PIE works to prevent packages from being modified at the wrong time.

    • Building a camera asset may change its data and dirty its package, but the previous method was doing when we were already inside the PIE world.

    • This change uses the same method as Blueprints, StateTrees, and so on, by using the BeginPIE delegate along with typed object iterators to gather objects to process just before PIE starts.

  • Add output return value pin to BP parameter setter node.

  • Add BP node function to get the owning rig.

• Network Prediction Plugin

  • Integrated time dilation feature to shrink input buffer size once network conditions improve.

  • Removed code related to physics integration that has been unsupported for a long time.

  • Added Iris replication support to the Network Prediction Plugin, while maintaining compatibility with non-Iris replication.

• Chaos Mover

  • Add optional server inputs for server side launch and other effects.

  • Stop applying angular velocity to target if the character should not remain upright and add option to never apply angular velocity to target in a falling mode.

  • Added some improvements for pushing into small, low objects.

• Game Input: Add haptic audio endpoint support via WASAPI and audio submix endpoints, just like the WinDualShock plugin.

• Add a new "Input Device Registry" (FInputDeviceRegistry) FInputDeviceRegistry is a thread safe registry to keep track of a FInputDeviceId to its name and type. This will make FInputDeviceScope obsolete. The registry is populated upon device connection and FInputDeviceId assignment, opposed to FInputDeviceScope's requirement of an actual input event call on the message handler being necessary.

• Adding MovementInterface meant to be used by various movement systems. By design it is very simplistic and helps with broad and common uses like gathering velocity, location and updated uobjects.

• Allowed conversation task nodes to choose branches in a specific order when advancing the conversation instead of always choosing a random branch. This makes it easier to set up progressive dialogue branches, e.g. a different branch based upon quest progress. Previously, each branch would need to have mutually exclusive conditions otherwise multiple branches would be possible and one would be randomly selected.

• In the Game Input plugin, make it possible to ignore or filter out devices from game input based on a VID/PID combo or their device family.

• Add a "preferred input API" setting to the engine. This will allow games to slowly roll out a change from an older input APIs like XInput to a more modern one like GameInput. The intent is that you could have a setting in your game, similar to a rendering setting for choosing which API to use, where players can enable/disable different input APIs to achieve the best compatibility for their setup. This has the added benefit of being able to "upgrade" a live project to use a newer input API with a fallback option via the config system.

• Spline Optimizations + Early out of SetClosed if it's already true. + Avoid re-constructing the TSet of normalized knot values in GetNearestAvailableKnotValue as this was being done repeatedly in GenerateDistanceKnotsForBezier. Reduces cost of GenerateDistanceKnotsForBezier by 90%. + Update FNewSpline::RebuildLegacyCurves to cache the attribute channels as these lookups were expensive. Also replace insertion sort of the rotation/scale points with a final sort at the end. + Add nullchecks when accessing scale/rotation attribute channels to prevent crashing when those channels are removed.

• Deprecate the Raw Input plugin in favor of the newer Game Input experimental plugin.

• Added support for dynamic (added at run-time) ability triggers to be used with abilities.

• Game Features: Made UGameFeatureData::GetDisallowedClasses() virtual so game project subclasses can prevent some Game Feature Action classes from being selectable.

• Converted Characters, Character Movement and dependent functionality to use a UObject representation of Movement Bases instead of UPrimitiveComponents. This opens up movement bases to non-actor objects such as FastGeoStreaming objects or Scenegraph objects.

  • ACharacter, UCharacterMovementComponent and other classes listed above have multiple examples of how to network and use this new struct, as well as examples of converting existing functions to use the new struct. See any function in the CharacterMovementComponent (such as UCharacterMovementComponent::RevertMove) as a good example of the new functionality.

  • ACharacter::OnRep_ReplicatedBasedMovement() shows a decent example of how to network and create this new struct from a UObject using MovementBaseUtility::GetMovementBaseDataFromPhysicsOwner.

  • FMovementBaseInterfaceData houses a UObject PhysicsObjectOwner and IPhysicsBodyOwnerInterface that implements necessary functions for basic movement base functionality.

  • FMovementBaseInterfaceData replaces UPrimitiveComponent as how code interacts with movement bases but a UPrimitiveComponent can be used to make a FMovementBaseInterfaceData easily as UPrimitiveComponent implements the IPhysicsBodyOwnerInterface interface and is a UObject so it is both the PhysicsObjectOwner and BodyInstanceOwner.

  • This change modified important classes/structs such as ACharacter, UCharacterMovementComponent, FBasedMovementInfo, FCharacterNetworkMoveData, FClientAdjustment and MovementBaseUtility with deprecation and fixup so they properly use new FMovementBaseInterfaceData struct. So any code extending the CharacterMovementComponent or code dealing with FBasedMovementInfo will likely need to be fixed up to support the new struct.

Bug Fix:

• Mover

  • Fix bug where skipping vertical anim root motion was not being respected in all montage cases.

  • Fixed inconsistent behavior during mode-changed events and the possibility of a queued mode getting ignored.

  • Fixed bug where sim proxy movement resulted in poor motion of any attached rigid bodies, such as ragdoll.

  • Fixed bug where activation of scheduled layered moves and instant effects would occur 1 frame late on variable-tick configurations.

  • Fix bug where a montage's RateScale was not respected during root motion layered moves.

  • Fixed issue with stale floor information causing teleportation-like behavior.

  • Disallow more than one active root motion montage layered move at a time.

  • Fixes crashes that can occur when compiling a MoverComponent BP while PIE is running with an instance of it.

  • Fixed sim proxy montage time drift that was causing divergence with root motion animation playback.

  • UMovementUtils::ComputeVelocity now limits velocity input to max speed properly.

  • Fixed issue where residual spring state persisted after interruption, such as during a root motion montage.

  • Fixed issue where sim frame counts in trajectory prediction were always starting from zero, and added optional start time/frame to the prediction params.

  • Fixed crash that could occur if there was a rollback before BeginPlay completed.

  • Fixed bug where an invalid up-direction would result in any gravity override being turned off.

  • Step Up/Over functions now track and return movement time so we can properly keep track of it in movement modes. This fixed an issue in walking transitioning to falling that launched the character.

  • Initializing some FollowPathMode data in mode Activate so we guaranteed run it on servers and clients. This fixes a bug where control points sometimes never get initialized in forward predicted movement.

  • Fixed crash when using User-Defined Structs in a Mover data collection when Iris networking is enabled.

  • Fixed crash that could occur when dragging and dropping an asset into an already-running PIE session.

  • Fixed crashes that could occur when editing properties of a MoverComponent at runtime through the editor Details panel.

  • Fixed bug where the Play Montage BP node would find the first mesh component instead of the primary visual component.

  • Adding read write lock when Queueing LayeredMoveInstances.

  • Fixed issues when trajectory prediction was queried before MoverComponent was finished initializing.

  • Fix UNavMoverComponent::GetFeetLocationBased nullptr MovementBase access and invalid supplied data causing occasional EPathFollowingResult::Blocked for AI agents due to bad samples.

  • Fixed up incorrect UE_REQUIRES arguments in GetMoverComponent and GetMoverComponentChecked functions in MovementModes.

  • Fixed bug where a tag cancellation request would cancel a layered move that was queued later during the same frame.

  • Fixed bug where continuous corrections could occur when transitioning from a skeletal mesh base with a valid bone to a static mesh.

  • Fixed bug where simulation events with timestamps close to each other could be processed out of order.

• Enhanced Input

  • Prevent triggers from re-firing after FlushPressedKeys while key is held.

  • Fix a long standing Enhanced Input issue around input triggers and modifiers not correctly maintaining their state when RebuildControlMappings is called.

    • Now when control mappings are rebuilt, if a key mapping already existed and its modifiers/triggers have not changed, each UInputTrigger and UInputModifier will call a "OnReinstanced" function (OnTriggerReinstanced and OnModifierReinstanced respectively).

    • This provides triggers and modifiers the chance to copy over any state that needs to be preserved across key mapping rebuilds. You can also implement these functions in custom Blueprint trigger or modifier classes by overriding the "Receive Reinstanced" functions.

    • This fixes bugs such as "Down" triggers having their input events re-fired every time the control mappings are rebuilt, even though you have not yet released the key.

    • This also fixes some issues with input modifiers which maintain state over time, like smoothing modifiers that want to keep track of the last used input value. This also fixes an issue with key mappings which _are_ actually new, and did not respect the bIgnoreAllPressedKeysUntilRelease flag. Now, new mappings will correctly be ignored if they are down when an IMC gets added and has a mapping to them.

  • Fix a bug where key mappings would not correctly be ignored if the input was just flushed (for example, by changing input modes between Game and UI for the player controller).

  • Fix mappings to AnyKey getting into a broken state when mouse scroll wheel up/down were used.

  • Enhanced Input: For boolean input actions mapped to touch Fkeys (FKey::IsTouch), the X,Y values of the keys will be the screen coordinate position. This means that a boolean input action will always evaluate to true, even after the touch has been released. To fix this, have Enhanced Input check the key state's bPressed value instead of the raw X,Y value in UEnhancedPlayerInput::PrepareInputDelegatesForEvaluation. This will ensure that touch FKey values have the expected trigger state flow and are calculated correctly in the IsActuated function of UInputTrigger.

• Mover Examples

  • Fixed crash that could occur if FollowSplineMode had a bad/missing spline actor during setup time.

  • Improving handling of orientation intent when not orienting to the movement direction.

• GAS

  • When marking abilities as garbage, also mark any SubObjects of those Abilities as Garbage. LyraGameplayAbilities can have SubObjects that must be MarkAsGarbage with their Outer.

  • Fix for GEComponents accessing other UObjects during PostInitProperties while AsyncLoading is enabled.

  • Using Generic Replication, the GameplayTagCountContainer could get stuck in a state where it constantly replicates a None tag if any of the tags were set to non-replicated.

• Cameras

  • Detail customizations for CineCameraComponent presets were not correctly checking IsEditable on the properties, and missing applying some new properties.

  • Fix rewind debugger crash when recording post-process settings with weighted blendables.

  • Fix missing pin on nodes in camera shake graphs.

  • Fix DPI scaling issue in debug renderer.

  • No longer asserts when (re)activating a Gameplay Camera component that is already active.

  • Fix issues with camera actions started on the same frame camera rigs are activated When a camera rig instance is pushed on the main blend stack on the same frame that a camera action is started, that action could be created on the previously active camera rig, resulting in incorrect behaviour as the action only affected the camera rig that was blending out. This change therefore starts actions in a "pending" state where we don't create the action evaluator until after the camera director has run. To make this possible, evaluation services have a new callback for evaluating between the camera director update and the root node update. Added new unit tests for camera actions.

  • More fixes for not modifying assets during load/build unless warranted.

    • The code that upgrades old Camera Asset parameters to the new interface needs to reproduce the old bug that even non-visible parameters were included :(.

    • Non-visible parameters don't have the CPF_Edit property flag, so also patch that when loading data in the version of the engine that didn't handle property flags in property bags.

  • Fix regression bug about camera node parameters being incorrectly built when they use a camera variable asset.

  • Make sure the "aim at" action uses the shorter rotation to accomplish its goal.

  • Fix assert sometimes firing after rebuilding a camera rig When a Camera Rig Component is selected in the level editor, it shows up in the Details View and the customization for the Camera Rig reference is active. When the referenced Camera Rig is rebuilt, that customization automatically updates the reference's parameters property bag. So when the component itself ends up receiving the build notification, the reference's parameters are up to date. This prevented the component from reinitializing the evaluation context, and could lead to asserts if new parameters were added, since those entries wouldn't exist in the variable or context data tables.

  • Fix missing code path for connecting to struct data properties.

  • Remove calls to Modify() from PostLoad()

  • Fix incorrect pragmas.

  • Fix assert on running a Camera Rig component This is a fallout of a previous change -- the generated Camera Asset in a Camera Rig component didn't have the correct allocation info anymore for initializing the evaluation context's variable and data tables.

  • Fix unity builds potentially leading to symbol redefinition.

  • Fix asset dirtying problems between camera rigs and camera assets The first problem is that camera rigs build all the allocation information they need, including the memory needed for their evaluator tree, and the entries they need in the variables/data tables.

    • This can easily mark a camera rig asset as modified, when:

      • (1) evaluator classes change (e.g. a new field is added) or

      • (2) when a referenced camera rig, such as a prefab rig, changes in a way that affects its own allocation info.

    • This ends up prompting the user to re-save assets that they haven't touched, with no obvious reason why. So the solution to this is easy: only build allocation info during cooking. In non-cooked builds, we just allocate things as we go, which is less performant, but much better for the user.

    • The second problem is that camera assets were automatically gathering all the exposed parameters from all their referenced camera rigs, and using that as their own exposed parameters. This was simple and functional at first, but it also created the same problem: the camera asset would get flagged as modified when any referenced camera rig had new/changed/deleted parameters. This again prompted the user to re-save the camera asset for no good reason.

    • In addition to that, as camera assets grew in scope, they could start getting a lot of parameters that the user didn't necessarily want. Solving this problem requires a new workflow: the camera asset editor now has an "Interface Parameters" panel, similar to the camera rig editor. It lets the user add/remove parameters on the camera asset itself, and specify how each of these parameters binds to which camera rig's parameter. It effectively removes the automatic step of gathering all referenced camera rigs' parameters, and replaces it by a manual step where the user can pick and choose which parameters to expose on the camera asset. This way, modifying a referenced camera rig doesn't modify the camera asset: the user has to explicitly modify the camera asset if they want its interface to change. Other notes about this change:

      • All the builder classes and methods now pass around a base "build context", which contains information about whether we're cooking or not.

      • Camera assets are upgraded on build or open to get a default list of interface parameters that reproduces what was automatically built before.

      • When initializing a new camera rig instance, we now ensure that the variable/data tables have all the entries needed. This makes uncooked builds work by lazily allocated memory when we don't have the allocation info.

      • The camera director's GatherUsageRigInfo now does extra stuff out of the box, such as looking into the proxy redirect table, and removing unwanted things from the output.

      • The code that converts a variable/data entry info a graph editor pin type has been moved into a common place for reuse.

  • Move easing blend node to the correct directory.

  • Fix some edge cases with the context data table.

    • Prevent access to some template functions for enum types when it can return pointers to incorrect underlying int size.

    • Add some extra checks to array setters.

  • Continue recording debug info even when a camera system doesn't have any evaluation context active.

  • Fix bugs related to enums in the data table.

    • Store enums with an int32 for handling large flags enums.

    • Fix a bug where we have to convert the value (not the pointer) of a data table entry in the case of enums, which may have different backing types.

    • Also fix incorrect data traits for strings.

  • Fix incorrect FOV when using a vanilla camera component or actor as the view target inside a GPC camera manager When setting the FOV or focal length on a camera pose, we always need to invalidate the other so that both aren't defined at the same time.

  • Ensure we continue handling collision results events when we don't hit anything This fixes a regression where absence of collision would lack updating the damper to return back to the "rest" position.

  • Fixup default parameters on load as a workaround for a bug in FInstancedPropertyBags.

  • Fix possible crash when clearing the camera asset or camera rig asset on a component.

  • Protect panning framing node from introducing NaN rotations.

  • Fix some problems with the screen-space framing nodes.

    • No longer stops reframing once the target is in the dead-zone, keep following it if it's still moving.

    • Modulate the reframing based on the disengagement time to get a semi-random rest position inside the dead-zone.

  • Get rid of the debug info if we don't need it anymore This fixes a bug where editor visualization stops working if the user activated debug display once.

  • No longer offers to create graph nodes when going "up-stream".

    • Also, it caused an undo bug since, after creating a node of the same type, the schema was trying to connect that to the dragged pin (the "self" pin on the first node). Which isn't possible. So it would fail, which would cancel the connection transaction, which would cancel the creation transaction. But the creation happened, so it made the creation of the (useless) node non-undoable. Now we just don't offer to create it anymore.

    • The ObjectTreeGraph model is mostly meant to go from "left to right", i.e. from an object to its properties to the objects connected to these properties. Dragging the "self" pin to the left only offered to create the exact same node type because that's the only node type compatible with itself generally (unless there are subclasses in existence). So it's mostly useless.

  • Fix how the output camera component is created.

  • Fix possibly incorrect evaluation layer when starting a modifier rig.

  • Fix logging formatting.

  • Fix missing sub-object destruction in gameplay camera component.

  • Look for rigs and rig proxies used by directors more than one package away This fixes the issue of, say, a Blueprint director using some data table or chooser asset for selecting rigs, which meant that the "family shortcuts" and other things using the UsageInfo API had incomplete info.

  • Fix crash when opening the Blueprint palette The palette creates "template nodes" that aren't actually fully initialized, and are prevented from loading any data.

  • Fix double-negation and incorrect comment.

  • Fix GetActiveCameraRigEvaluationInfo returning the wrong information when rigs are blending.

  • Fix camera variable overrides not working in PIE In editor/PIE builds, the camera asset's AllocationInfo (variable and context data tables) is only populated at cook time, so it is empty when running in-editor. This caused GameplayCameras component overrides to silently fall back to default values. When AllocationInfo is empty, we now gather it transiently from the camera rigs at runtime, mirroring what CameraAssetBuilder does during cooking. Cooked builds are unaffected and continue to use the pre-computed AllocationInfo as before.

• Chaos Mover

  • Fixed the calculation of inverse inertia when applying jump reaction impulse. This ensures the correct impulse is applied when jumping from dynamic objects.

  • Fixed bug in pathed movement mode where looping could behave incorrectly.

  • Updated the ground check query sweep in falling mode to account for the updated velocity. This prevents fast moving characters falling through the ground.

• CMC: Prevent unexpected upwards velocity boost when jumping/falling upwards into an acute angle corner of steep walls.

• Level Streaming Persistence plugin: Fixed crash when persisting properties on a map placed actor that got destroyed but is part of a reused level instance.

• Fix an operator discrepancy in UEnhancedPlayerInput::AddMapping. Use the.Equals function instead of operator== on FEnhancedActionKeyMapping when adding mapping to enhanced input.

• Fix crashes when game feature plugins caused a garbage collection at a bad time, it now always performs the garbage collection at the end of the frame.

• Fix issue where trying to unregister an asset from a temporarily-unregistered DataRegistry would fail, causing GC leaks when the data registry is reinitialized later.

• Upon device connection, populate data in the UInputDeviceSubsystem about the given device if a valid FInputDeviceScope is available. This makes it a bit easier for gameplay code to query the input device subsystem when connection events happen instead of needing to wait for the user to actually press an input for it to be populated.

• Circular buffer: Reduced checked capacity limit that was too high.

• Multi Server: FPredictionKeys should always send full data when communicating with a proxy.

• Fixed assertion in FVisualLogger::CleanupRedirects.

• Fixed bug that would propagate stale CurrentEventData to future ability calls that received a nullptr CurrentEventData during activation.

• Fix bug where the tick manager could get deadlocked in EndPhysics because it failed to properly flush the manual dispatches.

• Fix issue where AsyncSaveGameToSlotForLocalPlayer would ensure if called twice in a row. It now sets the LastSuccessfulSaveRequest to the request that actually completed instead of the last requested.

• Fix ScalableFloats to correctly reset cached curve when serializing or copying. This fixes issues when used in inherited Blueprints.

• Fix several issues with C++ defined gameplay tags when a game feature dll is loaded after startup. Fast tag replication cannot support this case but Dynamic tag replication should now work correctly with late dll loads.

Deprecated:

• Improve comments for tick functions to correctly indicate thread safety, and deprecate GetLastTickGameTime because it was confusing.

• Enhanced Input: Deprecate the combo trigger. This trigger type is unreliable and can cause mapping contexts to be corrupted in the editor.

Mass

New:

• Mass Trace

  • Add missing trace events for archetype creation and entity moves during archetype splitting in MassEntity Introduce a batch UE_TRACE_MASS_ENTITIES_MOVED macro to trace multiple entity handles in a single call.

  • Extract MassInsights trace provider and analyzer to new MassDeveloper runtime module. Move FMassTraceProvider, FMassTraceAnalyzer, IMassTraceProvider, IEditableMassTraceProvider, and all supporting data types (FFragmentInfo, FArchetypeInfo, FEntityEventRecord, FRegion, FRegionLane, etc.) from MassInsightsAnalysis plugin to Engine/Source/Runtime/Mass/MassDeveloper under the UE::Mass::Trace namespace. Port all MassInsightsUI consumers to the new types. Simplify module entry point via SetupMassTraceAnalysis() factory function.

  • Add Sparse, ConstShared, and SparseTag fragment types to MassInsights and MassEntity tracing Include shared and sparse elements in archetype registration trace output Check derived types before base types in fragment type classification to avoid incorrect matches.

• Mass Commands

  • Extend fragment instance and build commands to support mixed element types in a single entity move New commands:

    • Add FMassCommandAddElementsWithSharedFragments<TTypes...> for composition-only changes + shared fragment values in one move.

    • Add FMassCommandAddFragmentInstancesWithSharedFragments<TShared, T...> for fragment values + shared values in one move.

    • Add convenience methods on FMassCommandBuffer: AddElementsWithSharedFragments, AddFragmentInstancesWithSharedFragments Extend existing commands to accept tags and sparse types:

    • FMassCommandAddFragmentInstances<T...> now accepts FMassTag, FMassSparseTag, FMassSparseFragment alongside FMassFragment.

    • FMassCommandBuildEntity<T...> same mixed-type support.

    • FMassCommandBuildEntityWithSharedFragments<TShared, T...> same mixed-type support.

    • Tags included in composition, excluded from value payload (GetAsNonTagGenericMultiArray).

    • Sparse types handled in-place via BatchAddSparseElementToEntities before composition changes EntityManager API additions:

    • BatchChangeCompositionForEntities overload with FMassArchetypeSharedFragmentValues.

    • BatchAddFragmentInstancesForEntities overloads with FMassTagBitSet and/or FMassArchetypeSharedFragmentValues.

  • Unify Add/Remove commands with FMassCommandAddElements and FMassCommandRemoveElements.

    • Add FMassCommandAddElements<TTypes...> (PushCommand batching) and FMassCommandAddElementList (PushUniqueCommand) for adding any mix of fragments, tags, and sparse elements in a single entity move.

    • Add AddElements convenience methods on FMassCommandBuffer (templated and runtime).

    • Redirect AddFragment, AddTag convenience methods to FMassCommandAddElements.

    • Deprecate FMassCommandAddFragmentsInternal and FMassCommandAddTagsInternal.

    • Add sparse element support to FMassCommandAddFragmentsInternal and FMassCommandAddTagsInternal by splitting sparse types to BatchAddSparseElementToEntities.

    • Add check in BatchChangeCompositionForEntities rejecting shared/chunk/sparse on Add side.

    • Add chunk fragment rejection in BatchAddElementToEntities and AddElementToEntity.

    • Fix CheckBreakpoints signature on AddElements and RemoveElements to match composition-only usage (entity-only, no fragment instances).

    • Add unit tests for chunk/shared/sparse Add-side gaps.

  • Add bitset-level and runtime type validation for Mass element composition.

    • Shadow GetTypeBitSet<T>() in DECLARE_NEWTYPEBITSET to static_assert that T matches the expected element subtype, not just FMassElement (root cause fix for typed bitset accepting wrong element types).

    • Add testableCheckf guards in BatchChangeCompositionForEntities to validate that ElementsToAdd and ElementsToRemove contain only tags and fragments, catching misuse before it reaches InitializeWithSimilar.

• Extend BatchRemoveElement to support shared fragments and add unit tests.

  • Extend IsElement() to accept shared and const shared fragment types.

  • Extend BatchRemoveElementFromEntities and RemoveElementFromEntity to dispatch shared and const shared fragment removal via new InternalBatchRemoveSharedFragmentsFromEntities.

  • Add testableCheckf to Add element APIs rejecting shared fragments with clear message.

  • Add unit tests for FMassCommandAddElement/FMassCommandRemoveElement covering tags, fragments, shared fragments, const shared fragments, mixed types, and negative cases.

• Additional archetype information (list of elements, list of entities) retrieval.

• Added a single call to check fragments or tags or in an archetype.

• Mass trait validation errors now highlight the trait net mode to help pinpoint the issue.

• Queries can now return a topology hash for their archetypes.

• Added UMassRepresentationActorManagement::IsActorReadyForRepresentation, a virtual hook (default returns true) used to wait for actor readiness before switching off ISM. While the hook returns false the processor keeps the ISM/SkinnedMesh visible and the spawned actor disabled; game-side subclasses can override it to gate the transition on async asset streaming. The wait is bounded by the ai.massrepresentation.MaxActorVisualReadinessWaitFrames cvar (default 255), after which the actor is force-enabled and a warning is logged.

• Added trajectory generation and spring movement code to MassGameplay (experimental) Mass Traits:

  • U Spring Movement Trait: Adds spring-damped movement.

  • U Trajectory Trait: Adds trajectory generation.

  • U Trajectory Movement Trait: Overrides movement to follow trajectory.

• Removed MassEntity's dependency on AITestSuite. The testable-ensure mechanism (global counter + 3 macros) was moved into MassCore itself, so it no longer pulls in AIModule and GameplayTasks through a Developer module.

• Mass Debugger: Added SparseElement bitset to the archetype details Note that the information exposed is the aggregated info from all chunks; it doesn't mean that all entities have the element.

• Modified UE::Mass::Utils::CreateEntityCollections to handle the common single-entity input case, and to perform better when multiple entities of the same archetype are processed.

• API Change: Made the FMassArchetypeCompositionDescriptor(const FMassElementBitSetand) constructor non-explicit, in preparation for the near-future removal of FMassArchetypeCompositionDescriptor.

• Mass Gameplay Debug: Made AssignDebugVisProcessor editor only to prevent useless registrations on non-editor builds Also made sure it is properly setup for registration when WITH_MASSGAMEPLAY_DEBUG i s0.

• Mass Entity: Add observer support for shared fragments and swaptag.

• Added the missing FMassCommandRemoveElement command.

• API Change: Renamed FMassEntityManager::AddElementToEntities and RemoveElementFromEntities to BatchAddElementToEntities and BatchRemoveElementFromEntities respectively, for consistency with the rest of the API.

• Extended the MassEntityManager and Archetype API to support the use of struct views.

• Added a flag to EntityBuilder to force-committing always through Mass commands. Added the mass.EntityBuilder.ForceDeferredCommit cvar to set this behavior project-wide.

• Added a way to configure MassEntityTraits to be valid for a specific target configuration (Standalone, Client, Server, etc).

• Move Actors for entities spawned by AMassSpawner into an Outliner folder that matches the name of the spawner.

• Added Sparse Elements, along with support in queries, commands, and entity builder. Sparse Elements are Mass elements (tags and fragments) that can be added to entities without causing them to change archetypes — they are not part of an archetype's composition and are handled individually per entity.

• Renamed GetOrSpawnActorFromTemplate to GetOrRequestSpawnActorFromTemplate to reflect that the function requests a spawn rather than spawning synchronously. Declaration, definition, and all callers were updated.

• Exposed mass processing phase tick functions in public API to allow for setup of tick dependencies.

• TStructTypeBitSet changes to support "single element bitsets":

  • Alternative implementations of bitwise operators.

  • Default to 8 elements as bitarray's initial allocation size.

  • Modified some functions' signatures to support more flexibility.

Bug Fix:

• Fixed matches queries with Any fragments and tags to archetypes with only one or the other.

• Mass entity world subsystem now flushes remaining commands on deinitialization. This is required to cleanup any elements registered to other subsystems or rendering scene.

• Improvement: [Mass Representation] Switched two manually calculated bDoKeepActorExtraFrame branches to use the new UE::Mass::Representation::ShouldKeepActorExtraFrame helper. Bug Fix: [Mass Representation] Fixed the issue where the original conditions weren't respecting the value of FMassRepresentationParameters.bKeepActorExtraFrame.

• Mass Debugger fix: Struct redirects are now applied when pasting query JSON, mirroring the pattern in FInstancedStruct::ImportTextItem.

• Fixed an overzealous check in UMassAgentComponent::PausePuppet that crashed the function when called on a non-puppet. Switched the check to an ensure.

• Fixed: The Mass debugger running with an invalid entity.

• Fixed an issue in UMassSpawnerSubsystem::DoSpawning's BatchSetEntityFragmentValues when called in a loop with a single CreationContext — by iteration N the context included archetypes from prior spawns with different fragments. The call now builds a fresh local collection from just the current call's spawned entities.

• Fixed infinite recursion in FMassEntityConfig::FindTrait when the parent config chain contains a cycle.

• Fixed a MassAgentComponent assert when Iris destroys a puppet in the PuppetPendingReplication state. UnregisterAgentComponent previously had no handler for this state, so when Iris destroyed a replicated actor before its NetID replicated (e.g. on relevancy change) the component was stuck with no entity handle and no NetID. Added PuppetReplicationAborted() to cleanly bail out to None.

• Mass Debugger: Fixed wrong hierarchy representation of unnamed archetypes in MassDebugger by adding a composition hash identifier for unnamed archetypes and filtering out the None entry from debug names.

• Fixed `FMassCommandAddFragmentInstances` ignoring its `OperationType` parameter. The constructor accepted the argument but its initializer list hardcoded EMassCommandOperationType::Set, causing FMassCommandBuildEntity (which passes Create) to sort as Set during command buffer flush and hit a checkf on `entity state == Reserved`.

• Add stale model check to entity list refresh guard condition in Mass Entity Debugger.

• Fixed warning messages regarding undeclared subsystem access via FMassSubsystemAccess.

• Allow multiple registration of types with Mass, which avoids an ensure when using Mass from Game Feature Plugins.

• Removing CDOs from Mass settings on modules' unload.

• Fixed an off-by-one in CacheSubsystem where Subsystems.AddZeroed computed the wrong resize delta (Num() - SystemIndex instead of SystemIndex - Num()). The array is pre-sized in the constructor so this had not blown up in practice.

• World Condition: Fixed case where world condition queries would not be properly linked when embedded in a struct.

• Made naming spawned actors with the entity's GUID (when available) optional, and changed the default to false, since the previous behavior could cause unexpected issues.

• Fix for exporting struct array properties as json.

• AI Controller: We now end all tasks owned by the controller before calling OnUnPossess on the base class since those tasks might require access to the pawn's associated controller to exit properly.

Networking

New:

• Iris

  • Allow users to subclass UNetObjectPrioritizer easily.

  • Allow options to be passed to UE_NET_IMPLEMENT_NAMED_STRUCT_LASTRESORT_NETSERIALIZER_INFO and UE_NET_IMPLEMENT_NAMED_STRUCT_LASTRESORT_NETSERIALIZER_AND_REGISTRY_DELEGATES. Current options are to set the max quantized size, exclude from default state hash and custom fragment registration.

  • Added FInstancedStructNetSerializer delta serialization support.

  • Added the LogIrisCreationFlow log category to trace server-to-client root object creation timing across key Iris replication events, making it easier to correlate server and client logs and measure end-to-end object initialisation latency.

  • Fixing NetTrace to work with TailBuffer.

    • When active, the TailBuffer is constantly caching trace packets for the duration of a session. This means we need to ensure that each NameId is unique for the whole session, and also included in Important events to make sure there's no missing data.

    • It also means we may see multiple ConnectionCreated events with the same ConnectionId, as Traces aren't started/stopped in the same way when outputting a TailBuffer, so in the NetTraceAnalyzer we only update the ConnectionState the first time.

    • ResetLifetimeConditionDebugNames and OnResetPersistentNetDebugNames removed from the API as they are no longer required and would break the Trace Tail Buffer Fixing NetTrace to work with TailBuffer by keeping DebugNameIds consistent.

    • ResetLifetimeConditionDebugNames and OnResetPersistentNetDebugNames removed from Iris Net Trace API as they cause broken traces if Trace Tail Buffer is in use.

  • Added optional parameter to control if a subobjects child subobjects replicate before or after their parent.

  • ActorComponents still defaults to replicate their SubObjects before the components to not cause any unexpected divergences.

  • Clarified documentation.

  • Deprecated ESubObjectInsertionOrder::ReplicateWith in favour of explicitly specifying root and parent when adding a subobject.

  • Fixed bug where using ESubObjectInsertionOrder::InsertAtStart would shift conditionals around and apply them to the wrong subobject.

  • Added ensure if reliable attachementqueue is overcommited.

  • Implemented support to allow start and StopReplication being called multiple times for static objects including support for flush.

  • Refactored FlushLogic to be more robust and behaves closer to normal destroy.

  • Fixes issue where the same static NetRefHandle/Object could end up being replicated as multiple NetObjects/Channels causing bugs on client.

  • Fixed case where flush was not propagated properly to new connections.

  • Fix for ObjectPoller using the parent net stats rather than the passed in child net stats. Fixed a small chance of incorrect stats being generated when using NetStats with Multithreaded Iris Polling.

  • Replicated objects with creation links to other objects will replicate after creation dependencies before they replicate to reduce reordering on clients.

  • Implemented debug write pass for ReplicationWriter that writes NetObjects marked as debugobjects using separate packets not counting against bandwidth limit.

  • Added API for marking an object as a DebugObject.

  • Added API for allowing DataStreams to write DebugData that does not count against bandwidth limits.

  • Add a PreferredReplicationSystem setting to FIrisNetDriverConfig that can override the net.Iris.UseIrisReplication cvar for specific NetDriverDefinitions.

• Multi Server

  • Adding OnAllServersConnectedEvent as a potential Event to listen to.

  • LaunchMultiServer now supports -BotCount=XX which allows you to specify an overall number of bots which works in both -client=proxy and -client=direct mode.

• Iris Parallelization

  • Added API for network HandlerComponents to indicate support for being run in parallel. Enabled NET_ANALYTICS_MULTITHREADING so that OodleNetworkAnalytics can run in parallel Network HandlerComponents can indicate support for running in parallel per-connection. Enabled NET_ANALYTICS_MULTITHREADING by default.

  • Added API for network HandlerComponents to indicate support for being run in parallel. Enabled NET_ANALYTICS_MULTITHREADING so that OodleNetworkAnalytics can run in parallel Network HandlerComponents can indicate support for running in parallel per-connection. Enabled NET_ANALYTICS_MULTITHREADING by default.

  • Adding thread safety to NetworkMetricsDatabase and the related stats in NetDriver Added thread safety to NetworkMetricsDatabase and the related stats in NetDriver.

  • Make Net Tracing existing objects and object creation threadsafe. Added a SharedNewObjects list to temporarily store newly created objects in parallel net connection tick and then merge them with the full list after NetConnection Tick has completed. Net Tracing for object creation has been made thread safe for Iris Parallelization.

  • Make Net Tracing existing objects and object creation threadsafe. Added a SharedNewObjects list to temporarily store newly created objects in parallel net connection tick and then merge them with the full list after NetConnection Tick has completed. Net Tracing for object creation has been made thread safe for Iris Parallelization.

  • Added thread safety functionality to DeltaCompressionBaselineManager. Added FScopedBaselineAccess which guards parallel access to the BaselineManager, which is used in the ReplicationWriter in preparation for running it in parallel. Also renamed GetIsInParallelPhase to IsInParallelPhase to align with Iris Beta naming conventions. Added thread safety to DeltaCompressionBaselineManager.

  • Added thread safety to NetBlob, NetTokenStore, NameTokenStore, StringTokenStore and StructNetTokenDataStore

    • Added ExcludeParallelIrisSupport to TargetRules.cs so that licensees can remove these mutexes if they intend to run the server in single threaded and want a few nanoseconds of perf back.

    • Can be removed from compilation using ExcludeParallelIrisSupport.

    • Added UE_SUPPORT_PARALLEL_IRIS define which includes multithreading logic only on Server and Editor builds by default. Client only builds do not need the mutexes included as they will not run the replication logic in parallel.

  • NetConnection::Tick can be run in parallel on the server by setting net.iris.AllowParallelNetTick to true. UChannels can indicate support for parallelism in SupportsParallelTick Implemented thread safety for ObjectReferenceCache Iris replication supports parallel NetConnection Tick to run the write phase across multiple threads.

• Improved connection startup latency for numeric IPv4 addresses by sending the initial handshake packet in the same frame instead of waiting for the next-frame async resolution path. The net.NumericIPSyncResolve CVar can be used to disable synchronous resolution and restore the previous behavior.

• Added experimental NetworkServiceDiscovery plugin providing Windows/Mac/iOS/Android mDNS/Bonjour service announcement and discovery.

• Added a runtime CVar, HTTP.Curl.MaxHostConnections, to control libcurl's per-host HTTP connection limit and allow the concurrent request limit to be modified on demand.

• Add FScopedNetEmulationOverride class for easy, temporary network emulation overrides in test cases.

• FNetBitArray's ForAllSetBitsInRange is now handling invalid StartBit and EndBit parameters more gracefully.

• Net: Bumped default ServerDesiredSocketReceiveBufferBytes and ClientDesiredSocketReceiveBufferBytes to 262144 bytes to avoid dropping data if user does not override settings.

Bug Fix:

• Iris

  • Output the entire default state of replication state descriptors when encountering protocol mismatch errors.

  • Fix issue with destroyed object with destruction info being mistaken for a destruction info. Allow destroyed object with destruction info to be replicated if it needs flushing for example due to a reliable RPC being called the same frame it's added for replication.

  • Fixed memory leak in PolymorphicStructNetSerializer.

  • PlayerStates are now prioritized using the NetObjectCountLimiter with the PlayerStateCountLimiterConfig by default and as intended.

  • Fixed replication issues when connecting a standalone client to a PIE server.

  • Fixed internal leaks of subobjects being torned off.

  • Fixed filtering hysteresis bugs for late joining connections.

  • No longer stores instanced struct type in the InstancedStructNetSerializer default state as the client is not being able to resolve the type.

  • Fixed rare crash when enabling parallel polling.

  • Fix issue with newly created dependent object entering hysteresis despite parent being filtered out already.

  • Fixed issue with dependent objects potentially getting replicated when they shouldn't and vice versa.

  • Fixed bug where new objects assigned to a previously used internal index could end up not being properly polled on empty servers.

  • Fixed issue where out of scope objects being created and destroyed the same frame requiring flush would be destroyed using the wrong code path.

  • Only call SetActorIsPendingPostNetInit for actors that are expected to call PostNetInit.

  • Fixed issue where a static actor would skip their call to BeginPlay if they are in pending dispatch list and BeginPlay was issues on world triggered from OnRep of another actor.

  • Fixed issue with ObjectPoller not force polling ObjectReferences for pushbased fragments in mixed protocols after GC.

  • Fixed scheduling of dependent objects to not be reversed if spilling over to next packet.

  • Fixed bug where unicast rpcs did not respect RPCSendPolicy.

  • Fixed bug where replicated objects overcomiiting reliable attachment send queue was not properly marked dirty when queue could accept send more data.

  • Addressed issues with PacketNotification getting stuck in deadlock if both ends overshoots ack sequence history.

• Multi Server: Multi-Server Proxy uses GetLocalRole rather than GetRemoteRole as we are executing in the context of a Client (GetLocalRole is what the Server assigned us and GetRemoteRole is always ROLE_Authority).

• Corrected inconsistent initial conditionals in void AActor::GetReplicatedCustomConditionState() reversed compared to what is later set in AActor::PreReplication.

• Fix for DemoNetDriver crashes due to accessing memory in destroyed actors.

• Fix for issue where replayout did not respect net.ReplicateCustomDeltaPropertiesInRepIndexOrder and always replicated CustomDeltaProperties in RepIndexOrder.

• Fix StaticMeshActor instances not replicating when setting are applied on the instance instead of the Blueprint asset.

Learning Resources

Sample Content

New:

• Enabled HDR display support and added HDR display settings to Lyra.

Level Design and Art Tools

New:

• Hide RayTracing, Navigation, LOD, HLOD categories from SplineComponent : The spline component inherits them from the primitive component but is not renderable or navigable itself.

Bug Fix:

• Preventive fix for water brush against OnLevelAdded/Removed callbacks that can get called while the actor is unreachable.

• Fix GetDynamicWaterInfoCenter output Fix missing implementation of GetDynamicWaterInfoBounds.

• Fixed edit condition for water nav area class.

Geometry Core

New:

• Extended the FSubdividePoly Dynamic Mesh OpenSubdiv wrapper to interpolate all standard mesh attributes. Now e.g. UVs, skin weights, colors, etc will be interpolated when using Catmull-Clark or Loop subdivision in modeling tools or Geometry Script.

• General attribute support for FMeshSimplification.

• Generalize SkinWeightBinding operation to support 'constrained' binding, where vertices can only bind to a known subset of bones.

• Added a point-triangle distances connection method to vertex connected components, to help optionally join nearly-connected islands when computing mesh islands.

• Added vertex-based region of interest update paths to DynamicMeshComponent, matching the Triangle ROI paths + exposed these update paths to UPreviewMesh also.

• Added option for sparse point octree ParallelRangeQuery to also use a custom TFunctionRef to filter which bounds are relevant to the query.

• Added vertex and triangle selection versions of FDynamicMesh3's bounding box compute method (with similar logic to compute in parallel chunks).

• Added option for dynamic mesh overlay's per-vertex build to make the elements exactly 1:1 with vertices, so caller doesn't need to worry about the vertex to element ID mapping.

• The dynamic mesh's attribute set generic attribute accessor now returns nullptr if the attribute is not found, rather than failing a check(), to match how most of the other accessors work when requesting an attrib that doesn't exist.

• We now fill colors from hole boundaries in most hole fill operations (except smooth hole fill).

• Made DDC cache put responses return the record/value that the cache contains This can be used to detect conflicts between new and existing data, when not overwriting existing data.

• Added medial skeleton → hierarchical / animation skeleton conversion via minimum spanning tree.

• Added medial-axis sampling/skeletonization to GeometryAlgorithms.

• Added a method for VertexConnectedComponents to merge only the close vertices that pass some other filter, so e.g. one can only do this merge step for boundary vertices (which can be much faster than doing it for all vertices, and also can avoid connecting some intentionally-separated-but-nearby vertices) Added a thread-safe method for getting the cluster ID of vertex-connected components.

• Added a MeshVertexNormals method that can account for implicit welding -- i.e. a known mapping of some vertices to common weld vertices.

• Added a Sort() method to FIndex3i, to change the indices to a sorted order (ala the one already on FIndex2i).

• Improved the dynamic mesh simplification algorithm to be smarter about what edges can collapse. Added an edge constraint tolerance distance to optionally limit how far constrained edges can move during simplification.

• Added mult-label version of mesh iso curves cutting, via adapters to support arbitrary mesh types.

• Geometry Script and Modeling Mode mesh to convex hull nodes and tools now have a geometric tolerance for hull simplification, to allow simplification below the target triangle count when it will not introduce more error above the geometric tolerance threshold.

• AABB tree now supports meshes with FVector3f vertex storage.

• Added optional regularization to the QEM simplifier.

• Added optional scaling functions for the QEM simplifier metrics (quadric error, target length, and geometry error).

• F Sparse Dynamic Point Octree3: Export FindKClosestPoints function.

Bug Fix:

• Fixed a crash that could occur due to an edge case in the AABB Tree building logic.

• Fixed performance issue with MeshSelfUnion on meshes with many open boundaries by using pointhashgrid to filter potential edge matches in self union by midpoint. Also now check for edge vertex position matches in either ordering.

• Fixed issues with sparse dynamic point octree.

  • Fixed queries hanging on very large query bounds (by refactoring IterateRootsInRadius's logic to clamp query ranges and fall back to all-root iterations into a general root iteration helper)

  • Fixed points very near cell bounds crashing on insert due to floating point error making CellContains() not agreeing with the cell assignment. Now CellContains directly uses the cell assignment logic. Fixed issue w/ octree range iteration methods where we could potentially overflow the large-range test by casting to double too late.

• Fixed minimal hole filler accidentally passing the input mesh by value to the CheckIfEdgeFlipCreatesFlip helper function.

• Fixed crash in hole fill op where it could use reference a triangle with unset UVs.

• Improved edge collapse parameter interpolation for dynamic mesh's mesh simplification method.

• Fixed DynamicMesh CompactCopy checking the wrong mesh's attribute set for compactness. Fixed const correctness of IsCompact on attribute set.

• Fixed mesh simplifier's bad placement of boundary vertices (e.g. rounding off corners) -- it now considers error when picking boundary vertex position instead of always just picking the midpoint.

• Fixed the FModuloIterator struct ignoring StartIndex.