I can understand that of course. So that means even though they can be exported in a same format as in 3DS, but their diff tech. make one smooth and the other faceted when rendered?! I just modeled a Cylinder in Form.Z and saved it in 3DS and loaded it in Vue. It is also smooth when rendered and it was created the same way as the Sketchup model. First the circle and then extruding in z direction. I will have to do few more tests. Wings3D is a polygonal mesh modeler as this reads on their website: , so got to do more research. Thank you guys again.