forums.naturalpoint.com

The current file format for importing custom rigid bodies is .X

I don't know any 3D program that outputs into that format.

Any chance we can get some support for .obj or .fbx mesh files?

we will look into it, and that using "polytrans" might be an option in the meantime.

Hello,

Supporting other 3D file format for rigidbody display is in our task list, but may not be ready for some time.

Another useful and less expensive 3D file converter I use is Ultimate Unwrap 3D:
http://www.unwrap3d.com/index.aspx