Overview of Geometry in Twinmotion | Twinmotion Documentation

Twinmotion supports geometry file formats from most major design applications. This includes the .udatasmith file format created with the Datasmith Exporter plugins.

Geometry files typically contain meshes and textures. Some of them may contain metadata you can view in Twinmotion, and .udatasmith, .glB, and .glTF files can contain lights.

When you import geometry files into Twinmotion, you can choose import options to optimize how various properties are handled during the import process, such as how geometry is collapsed, and settings for lights, materials, and UV mapping. The import options can vary depending on the file format of the geometry. For information on the available import options, see Import Options.

In order to improve rendering and performance in Twinmotion, you can optimize geometry by enabling the Nanite system or using the automatic LOD generation feature. For more information, see Optimizing 3D Models for Real-Time Rendering.

For information on how to import geometry files, see Importing Geometry.

Supported Geometry File Formats

Twinmotion supports the following geometry file formats:

As of Twinmotion 2026.2 Preview, .3ds, .c4d, .dae, .dxf, and .stl files can no longer be imported directly into Twinmotion. To import these types of files into Twinmotion, you must first convert them to a file format supported by Twinmotion. You can also import .3ds files using the Datasmith Exporter plugin for 3ds Max.

File Format	Description
`.udatasmith` (Datasmith)	In design applications that support the Datasmith workflow, you can convert the projects you create into `.udatasmith` files and import them into Twinmotion. Certain design applications have this functionality built-in, while for others, you need to download and install the Datasmith Exporter plugins. For information on design applications that support this workflow and to download the plugins, see Supported Design Applications for Datasmith. For information on how to create Datasmith files that you can import into Twinmotion, see the Datasmith File Import Workflow.
`.gltf`, `.glb`	GL Transmission Format is an open-standard file format for 3D scenes and models. It is created and maintained by the Khronos Group and designed to be compact and load quickly. Files in this format use either the `.glTF` or `.glB` extension. The `.glTF` and `.glB` file formats have the following limitations: Certain materials with complex shaders, such as frosted glass or sheen, will be converted to default Twinmotion generic materials. To import animated `.glTF` and `.glB` files, see Importing Animated Files.
`.fbx`	FBX (Filmbox) is a file format owned by Autodesk. It is designed to allow the exchange of data between digital content creation (DCC) applications. To import animated .fbx files, see Importing Animated Files.
`.skp`	A proprietary file format for the Trimble SketchUp software.
`.obj`	An open file format first developed by Wavefront Technologies. Numerous design applications can open and export this file format. You can only import OBJ files saved as polygon mesh objects. Twinmotion does not support NURBS objects.
`.wire`	An Autodesk Alias file format used mainly in the automotive industry. Autodesk Alias must be installed on your computer in order to import `.wire` files into Twinmotion.