On Wed, 19 Dec 2001 16:00:12 +0100, "Simon Adameit" <gom### [at] gmxde> wrote:
> I want to make a pigment that uses the direction of the normal at each point
> of the surface, this is not possible with trace.

If slope pattern is proportional to normal vie on Direction parameter then I
think

pigment{
     average
     pigment_map{
       [3 slope x color_map{[0 red   -3][1 red   3]}]
       [3 slope y color_map{[0 green -3][1 green 3]}]
       [3 slope z color_map{[0 blue  -3][1 blue  3]}]
     }
   }

returns direction of the normal. But if slope pattern is proportional to the
angle then I'm wrong.

ABX

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