John M. Dlugosz <joh### [at] dlugoszcom> wrote:
: Which is exactly what I'm asking... care to demonstrate?  Ripples or Waves
: can produce one milling circle pattern, but the surface is covered with them
: in a grid pattern so the edges just overlap a little, like scallop shells.

  I'm not sure if I understand at all what do you mean.
  Do you mean something like this?

camera { location <0,10,-10> look_at 0 angle 35 }
light_source { <100,100,-100> 1 }
plane
{ y,0
  pigment { rgb x }
  finish { specular .5 }
  normal
  { wood 1 slope_map
    { [0 <0,2>]
      [.5 <1,0>]
      [1 <0,-2>]
    }
    rotate x*90
  }
}

  Modify the slope map at will.

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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