G'day again Radi, I suppose it's all in knowing which parameters to lock off. Main problem I'm having is finding a very good symmetrical one at the moment. Every time I start the program with the intention of finding a decent one to work on, I get stuck. After about the 3rd F3, I think "how that one will look with a few rotations this way, a couple that way, zoom in or out",. Then of course I have to do a quick render in gas then light then solid, then think about what colours I can bring out in solid, then do a couple of long renders, change some settings, try again, etc etc. But no worries, I'll find some one day (if I can get past the first few searches). Thanks for the tips. grumps =====================================================The Chaoscope mailing-list Archives : //www.freelists.org/archives/chaoscope Admin contact : chaoscope@xxxxxxxxxxxxxx Web site : http://www.chaoscope.org =====================================================