// STEP / The Modern 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 <3, 60, -30>
  look_at <0, -3, 0>
  angle 100
  }

light_source { <1000, 5000, 4500> color rgb <1, 1, 1> }

isosurface {
  function {
    y-50*int(0.9*sin(x*pi)+0.9)*int(0.9*sin(z*pi)+0.9)
    /((pow(int(x),2)+pow(int(z),2))/15+5)
    }
  threshold 0
  max_gradient 50
  contained_by { box { <-50, -1, -17>, <30, 11, 40> } }
  texture {
    pigment {color rgb <0.3, 0.5, 1>}
    finish {
      ambient 0.3
      diffuse 1
      reflection 0.5
      specular 0.8
      phong 0.5
      brilliance 1
      }
    }
  scale 4
  rotate y*10
  }