LOW  | | |
| Name | HOOPS Stream Format | STereoLithography |
| File extension | .hsf | .stl |
| Original software | ||
| Binary | ■ | ■ |
| ASCII | ■ | |
| Polygonal | ■ | ■ |
| NURBS | ||
| Solids | ||
| Smoothing groups | ■ | |
| Textures, materials | ■ | |
| Developer/Owner | Tech Soft 3D | |
| Description | ||
| Specification | Open HSF doc | The StL Format |
| Format features | One attempt to create « universal » 3D-format for publishing CAD-models. To date, work on improving it stopped | 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 |
| Viewing software | Hoops Publish | GLC_Player (free), MeshLab (free) |
