Hi Ed,
I'm trying to export to polygonal modeler blender3d and to render it with cycles or yafaray rendrers.I have problems with exported obj,fbx,3ds,lwo and other polygonal extensions.I tried with quad and triangles and with ngons too.I'v put a screenshot from glc player what kind of problems I have.If you know how to solve this problems please let me know.But I think the best results moi3d can give with nurbs extensions like 3dm native format and igs which I checked it out with igs viewer and it looks fine.