TT,

The best place to start is Mike William's Isosurface Tutorial
http://www.econym.demon.co.uk/isotut/. He has a section that deals
specifically with using pigments as isosurface functions
(http://www.econym.demon.co.uk/isotut/pigment.htm) as well as doing CSG
type operatings with functions
(http://www.econym.demon.co.uk/isotut/combine.htm).

Good luck,

Mike 
--
http://povray.tashcorp.net
http://hybrid.tashcorp.net

tommy thompson wrote:
> I've been looking through the povray examples
> and seen a collection called patterns as isoshapes.
> I looked at the pov file to see how they are generated
> but it was too complex and described how to make
> several at once (i think). It appears to be two shapes
> using the same pattern with some csg (i could be
> completely wrong).
> Can anyone give me a very simple example of how this
> works.
> thanks TT

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