Burr
Surprised at that question? Am I missreading?
One of the problems is limiting the number of parts that are in an object made in MoI. As they come from the file save can drive you crazy sorting them out to groups where the groups could share a similar shader.

If only MoI could export save the parts with the names given them in there!

Though Carrara can open nearly all of the MoI file types I tend to stick with 3dm or .obj,

Brian