===== 3D models =====
A 3D model is a digital representation of an object or scene in three dimensions. vrdoro supports various formats for the use of 3D models:
  * glTF file
  * ZIP archive with glTF file, bin file and textures
  * glb file with embedded textures
  * OBJ file
  * fbx file
  * vrml file (.wrl)
  * collada file (.dae)
  * step file (.stl)
  * BIM file (.ifc)
  * USDZ format (for download only)

vrdoro automatically converts the models into a glTF model with separate textures. This makes it possible to use and download models with compressed textures.