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| Name | Parasolid Model Part File | 3D Studio |
| File extension | .x_t, .x_b | .3ds |
| Original software | 3D Studio (DOS) | |
| Binary | ■ | ■ |
| ASCII | ||
| Polygonal | ■ | |
| NURBS | ■ | |
| Solids | ||
| Smoothing groups | ■ | ■ |
| Textures, materials | ■ | |
| Developer/Owner | Siemens PLM Software | Autodesk |
| Description | ||
| Specification | ||
| Format features | File geometric kernel Parasolid. Is used by CAD-systems such as NX, Solid Efge, SolidWorks | Has a limit on the number of polygons in a single file. Today is considered obsolete |
| Viewing software | Delcam Exchange 2012 (free) | GLC_Player (free), MeshLab (free) |