I don't know if this will be a help at all but... I've noticed that Vue4, is alot like Bryce in so far as it's GUI. I remember once reading in Bryces help files how to do just what you asked above, it had something to do with 1st making a boolean object, then using that symetrical object tool/board. I've noticed that Vue4 has that same phrasing so maybe it's possible in vue4 just as it is in Bryce. I remember when I was reading that in Byces help file it said, "this is the most valuable trick you'll ever learn" in so far as using Bryce was concerned anyway. So see if you can find out more about doing that in Bryce, and then maybe you can do it in Vue too. But then again maybe not. It's just a guess on my part. Xersius_x@yahoo.com I.B. Anim8in'