Try using the image map index instead of frequency.


//start
difference{
  torus{15 10}
  intersection{
    plane{-z 0}
    plane{-z 0 rotate y*20}
  }
  pigment{radial frequency 1
    color_map{
      [0 rgb <1,0,0>]
      [200/360 rgb <0,1,0>]
    }
  }
  translate -5*y
}

//end


-tgq

Post a reply to this message