Posted before, in the wrong group and a wrong title. 
Ref : <XnsA9D2EF41831AEseed7@news.povray.org>
http://news.povray.org/povray.tools.general/thread/%
3CXnsA9D2EF41831AEseed7%40news.povray.org%3E/

30+ functions for animations, building isosurfaces and textures.

Did a few updates on gradients.inc and added a simple function studio for 
function pattern development.

ingo

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Download 'gradients.zip' (7 KB)