Celestia Forums

Is it possible to create your own cmod file to change the shapes of objects? Any program exists?

You'll have to download or create a 3D model in another format (such as obj) and convert it to cmod. On Windows, this can be done using the 3D modeling program Anim8or with a plugin created by Selden, as described in this thread. On any operating system, you can use the tools available here.