// INT '03.07 / Brown
// By Tsutomu HIGO  URL: http://www.asahi-net.or.jp/~nj2t-hg/

#version 3.5;
global_settings {
  max_trace_level 3
  assumed_gamma 2.2
  }

camera {
  location <-2, -2, -4>
  look_at <-1.7, -0.5, 0>
  angle 110
  }

light_source {<80, 60, -90> color rgb <1, 1, 1>}

isosurface {
  #declare R=1;
  function {
    (pow(x+0.15*sin(0.6*x+0.6*z)-x/(abs(x)+0.000001)*R*int(abs(x/R)+0.5),2)
    +pow(y+0.15*sin(0.6*x+0.6*y)-y/(abs(y)+0.000001)*R*int(abs(y/R)+0.5),2)
    +pow(z-1*cos(0.4*x)+0.1,2)
    -0.16-0.09*cos(0.5*pi*pow(x*x+y*y,2)+pi)
    )*
    (z-1*cos(0.4*x))
    -0.01
    }
  threshold 0
  max_gradient 10
  contained_by {box {<-9, -5, -2>, <9, 11, 2>}}
  open
  texture {
    pigment {color rgb <1, 0.5, 0.2>}
    finish {
      ambient 0.1
      diffuse 1
      reflection 0.2
      specular 2
      phong 1
      brilliance 1
      }
    }
  no_shadow
  }

background {color rgb <0.5, 0.8, 1>}