JAS

JAS is a file format used to store 3D models created with the Cheetah 3D program, a Macintosh-based 3D modeling program. Apparently, according to various forum discussions on the topic, there is no publicly available spec or description of the file format details, but there appear to be binary and text-based (probably XML) versions of it.

Sample files

 * One is attached to this forum thread

Links

 * Cheetah 3D official site
 * Forum discussion
 * Another forum discussion
 * Yet another forum discussion
 * Discussion in Unity forum