I can make V3 (simple OBJ import) a live surface, so that's not a problem. However, if the arc of the 3D curve I draw is 'over' the horizon any lofting around the curve will of course cut right through her. So far the best bet seems to be laboriously creating a series of curves with most CV's on top of the V3 polys. This will take, of course, forever. I'm also thinking of getting V3's reduced resolution - that might convert to NURBS a little easier. == John ==