Combine materials
API function: algo.combineMeshes
Use this feature along with scene.mergePartOccurrences to combine part occurrences and their assigned materials. The result is a similar looking model, but the number of draw calls is reduced.

These operations are performed:
- Geometries are merged, but they aren't modified.
 - Texture coordinates are combined and repacked into a single atlas.
 - Material information is transferred to a single set of textures. This set is used by a single material that's applied to the combined mesh.
 
You can regenerate texture coordinates.
This feature bakes these maps:
- Albedo
 - Normals
 - Opacity
 - Roughness
 - Specular
 - Metallic
 - Ambient occlusion
 
The output material contains the packed textures atlas: