2026.1 HF1 contains a few bug fixes and stability improvements.
TM-23673 - Fixed an intermittent crash when closing the Preferences panel.
TM-23676 - Fixed an issue where animated masked materials did not cast animated shadows when the Virtual Shadow Maps shadowing method was used.
TM-23677 - Fixed an issue where water particles from the Library > Objects > VFX category were missing from renders.
TM-23678 - Fixed an issue where Twinmotion crashed when an empty folder was deleted in the Materials dock.