| filename extensions | art-335 |
| u3d | |
| TechTarget file types | art-336 | U3D-Model-file-format-Ultimate-3D |
| TechTarget file types | art-336 | U3D-Ultimate3D-Engine-3D-Engine-Ultimate3D |
| TechTarget file types | art-336 | U3D-Universal-3D-File |
| TechTarget file types | art-336 | U3D-Universal-3D-Header |
| English | eng-000 | Model file format - Ultimate 3D |
| English | eng-000 | Ultimate3D Engine 3D Engine |
| English | eng-000 | Universal 3D File |
| English | eng-000 | Universal 3D Header |