//Cayley's Ruled Cubic, a Type 9 Steiner surface
//by Adam Coffman

camera {
    location  <-50,28,20>
    look_at   <0,-7, -5>
      }
 #include "colors.inc"
 background{White}
 poly { 3 <
    0,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0,-1,0,0>
    sturm 
    texture { 
    pigment {
    gradient x
    color_map {
        [0.00 rgbt <1,0,0,0.2>]
        [0.33 rgb <0,0,1>]
        [0.66 rgbt <0,1,0,0.3>]
            }
    scale 2.5
         }
    finish{ambient 0.3}
    }
    bounded_by { cylinder{<4,0,0> <-4.2,0,0> 12 }  }
    clipped_by { bounded_by }
    scale <5,4,2>
    rotate x*180               
   }
  light_source{<0.5,80,0> White} 
  light_source{<-80,0,0.5> White}
  light_source{<80,0,0.5> White}
  light_source{<0,0.5,80> White}