Sara:

Think of OBJ as a language to describe a 3D model. As with real languages, there are plenty of dialects. Unfortunately not all dialects are the same. This can lead to incompatibilities when you try to import an OBJ model in SH3D.

Sometimes a workaround may help. Import the model in Blender , Misfit 3D or in Art Of Illusion . Then save or export the model again.

There is no guarantee, but sometimes this solves the problem.

Hans