This is a better example than my dinky hack :) <http://www.theory.org/software/qfe/> I don't have the ability to run it on my machine, but this is another good example: 4D fractals polygonized by implicit surface methods into objects you can view, colorize, texture, etc. -- Ask me about my upcoming book on Direct3D from Addison-Wesley! Direct3D Book <http://www.xmission.com/~legalize/book/> izfree: Open source tools for Windows Installer <http://izfree.sourceforge.net>