When i export to "3D coat" frm maya by OBJ some there is some serious disturbance found. But when i export the same OBJ to deep paint then the model shows no disturbance.it is perfectly all right with deep paint.But why so different? [attached img no 1] When i export to "3D coat" frm maya by FBX some there disturbance is found but less severe. [attached img no 2] Why this happen. while rendering in houdini using OBJ causes black shades at random places.So, i used FBX whose output was good. But why this happen?