kurtz le pirate <kur### [at] yahoofr> wrote:
> adding some things like translate rand(alea) in the pigment function 
> work as i want.

  Another possibility, which I think few actually know, is to do something
like this:

#declare IsoFunc =
  function(x, y, z, a, b, c)
  { max((y*y-1),(x*x-1),(z*z-1)) - pigmentFn(x+a,y+b,z+c).gray*0.75 };

isosurface { function { IsoFunc(x, y, z, 1, 2, 3) } }

-- 
                                                          - Warp

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