Thanks for the tip, mjustmike, but unfortunately, Rhino only works on PC's and I use a Mac. It's also rather expensive (I think) at $795 a copy. Or maybe this is usual for that kind of software. Maybe someday, more people will recognize the importance of the Mac in computer graphics. There are also other platforms coming along, some of which may truly rival windows in the near future. Okay, I'll quit with that. I know that's not a popular refrain.