MEDIUM ![]() | ![]() | |
| Name | Initial Graphics Exchange Specification | Rhino OpenNURBS |
| File extension | .igs, .iges | .3dm |
| Original software | Rhinoceros 3D | |
| Binary | ■ | |
| ASCII | ■ | |
| Polygonal | ■ | |
| NURBS | ■ | ■ |
| Solids | ■ | |
| Smoothing groups | ■ | ■ |
| Textures, materials | ■ | |
| Developer/Owner | U.S. National Bureau of Standards | Robert McNeel & Associates |
| Description | ||
| Specification | Download PDF | OpenNURBS |
| Format features | Universal open interchange NURBS-surfaces format. Along with STEP - one of the most popular | The format of the first NURBS-Modeling software for Windows. Is currently open, so there are converters from/to lots of formats |
| Viewing software | Delcam Exchange 2012 (free), eDrawings (free) | Deep View (free) |