Unity supports a number of standard and proprietary model file formats. Internally, Unity uses the .fbx file format as its importing chain. It is best practice to use the .fbx file format whenever possible, and you should not use proprietary model file formats in production.
Standard file formats
Unity can read the following standard 3D file formats:
- .fbx
- .dae (Collada)
- .dxf
- .obj.