.CMOD File Extension

Three-dimensional model file used by Celestia, a real-time universe visualization program; uses OpenGL technology for rendering and may be stored in either a binary or ASCII text format; used for displaying planets, stars, and other elements in space.

CMOD models can be exported using a variety of modeling tools if you have the appropriate CMOD export plugin. Examples of free modeling tools that have a CMOD export plugin include Blender and Anim8or.

NOTE: Celestia can also display models in the 3ds Max .3DS format, but CMOD files perform more quickly in the software.