// STEP / The Wonder World '05.10
// By Tsutomu HIGO  URL: http://www.asahi-net.or.jp/~nj2t-hg/

#version 3.6;
global_settings {
  max_trace_level 4
  assumed_gamma 2.2
  }

camera {
  location <20, 70, -100>
  look_at <0, -3, 0>
  angle 58
  }

light_source { <300, 2000, -1000> color rgb <0.8, 0.6, 1> }

isosurface {
  function { (y-int(6*atan(z/x)))*(y-int(6*atan(z/x))+1) }
  threshold 0
  max_gradient 500
  contained_by { sphere { <0, 0, 0>, 12 } }
  texture {
    pigment { color rgb <1, 1, 1> }
    finish {
      ambient 0.3
      diffuse 1
      reflection 0.5
      specular 0.8
      phong 0.5
      brilliance 1
      }
    }
  scale 4
  }