Bob Hughes wrote:

>Angle dependant pigments ahead of its time?

Mmm that would be a nice feature.
This one only uses different oriented normals:

#declare Lin= normal{gradient x 25 warp {repeat x} scale 0.01}
#declare Ribbel= normal{
      crackle
      solid // MegaPov 0.4!
      normal_map {
         [0.0, Lin]
         [0.1, Lin]
         [0.1, Lin rotate <0,0,36>]
         [0.2, Lin rotate <0,0,36>]
         [0.2, Lin rotate <0,0,72>]
         .
         .
         .
         [0.8, Lin rotate <0,0,252>]
         [0.8, Lin rotate <0,0,288>]
         [0.9, Lin rotate <0,0,288>]
         [0.9, Lin rotate <0,0,324>]
         [1.0, Lin rotate <0,0,324>]
      }
} 


Ingo

-- 
Photography: http://members.home.nl/ingoogni/
Pov-Ray    : http://members.home.nl/seed7/

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