How can I tell if I'm using a 32 bit texture? I've tried png, tga and jpg formats with no difference. I've applied the material with the normal map to a cube prim and it is working correctly, maybe it's a problem with the exported mesh and not the normal map texture? If it were the mesh I don't understand why the problem would only exist once a normal map is applied. Is there a way to preview the mesh with the entire material(not just diffuse) before uploading?