I want to remap a texture (say something from stones.inc) so that what 
you see is not a function of <x,y,z> but rather of <f(x,y,z), g(x,y,z), 
h(x,y,z)>, i.e. some substitute for the actual coordinates which is 
still a (nonlinear) function of those coordinates.  How hard is that to do?

If this is unclear, I'll try to rephrase.

(What I have in mind is to illustrate the various point symmetry groups 
with seamless pigments that show the relevant symmetries.)

-- 
Anton Sherwood, http://www.ogre.nu/

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