Anis

You don't, basically, take stuff from 3D Coat, or Z-Brush, back into MoI. They are poly modellers not Nurbs modellers. (As I see it, you can not properly create Nurbs(3DM) files from .obj files.)

Normally you would take the .obj file from them into a generalised 3D app--for example say Carrara--BUT, it would be an app that saves to the file type you need--Carrara may not be suitable?

Nothing straight forward in 3D unfortunately.

Brian