HIGH ![]() | ![]() | |
| Name | STereoLithography | Rhino OpenNURBS |
| File extension | .stl | .3dm |
| Original software | Rhinoceros 3D | |
| Binary | ■ | ■ |
| ASCII | ■ | |
| Polygonal | ■ | ■ |
| NURBS | ■ | |
| Solids | ■ | |
| Smoothing groups | ■ | |
| Textures, materials | ■ | |
| Developer/Owner | Robert McNeel & Associates | |
| Description | ||
| Specification | The StL Format | OpenNURBS |
| Format features | One of the most ubiquitous exchange formats polygonal geometry between CAD-systems. Can have both binary and ASCII-structure, which is why the same file can vary in size tenfold. See also PLY | The format of the first NURBS-Modeling software for Windows. Is currently open, so there are converters from/to lots of formats |
| Viewing software | GLC_Player (free), MeshLab (free) | Deep View (free) |