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| Name | Rhino OpenNURBS | Universal 3D File |
| File extension | .3dm | .u3d |
| Original software | Rhinoceros 3D | |
| Binary | ■ | ■ |
| ASCII | ||
| Polygonal | ■ | ■ |
| NURBS | ■ | |
| Solids | ■ | |
| Smoothing groups | ■ | ■ |
| Textures, materials | ■ | ■ |
| Developer/Owner | Robert McNeel & Associates | 3D Industry Forum, Ecma International |
| Description | ||
| Specification | OpenNURBS | Universal 3D File Format |
| Format features | The format of the first NURBS-Modeling software for Windows. Is currently open, so there are converters from/to lots of formats | Attempt to create a universal format for the exchange of 3D-data, including for publishing on the Internet. One of the successors of obsolete format WRL (VRML) |
| Viewing software | Deep View (free) | GLC_Player (free), MeshLab (free) |