have never used Quat so can't help you there, but the new, soon to be released (?) version 0.3 allows you to set/change various colour settings in solid mode. as for the trick to make an attractor from a self-made formula, not as far as i know. Nicolas would be better able to help you out there, but have never found anywhere to enter self made formula, or come across anything in the help files about it. don't seem to know much, do I? grumps =====================================================The Chaoscope mailing-list Archives : //www.freelists.org/archives/chaoscope Admin contact : chaoscope@xxxxxxxxxxxxxx Web site : http://www.chaoscope.org =====================================================