Originally posted by arran can you not just remake the planetary orbits by extruding a small nurbs circle along your nurbs curves? - that way you would have something that would render. Thanks for the response. I'd like to give that a try...however I'm a bit of a newbie, could you give me a short explanation of how to do that (if it's not too much trouble)? I selected an isoparm and clicked extrude, but Maya reported an error specifying a need for two NURBS curves (profile then path).