// FLIGHT / To the Hill '02.09
// By Tsutomu HIGO  E-mail: nj2t-hg@asahi-net.or.jp

#version 3.5;
global_settings {
  max_trace_level 6
  assumed_gamma 2.2
  }

#include "functions.inc"

isosurface {
  function {y-30/(x*x*0.5+z*z+5)+2/(x*x*0.5+z*z*1.5+0.01)-(f_agate(atan(x/z*0.3)*1.2,y*0.4,atan(z/x*0.4)*1.3)*0.1*(4-y*0.3))}
  threshold 0
  contained_by { box {<-28, 0, -20>, <20, 4, 3.5>} }
  max_gradient 30
  pigment { rgb <0.9, 0.9, 1> }
  texture {
    pigment {color rgb <0.9, 0.95, 1>}
    finish {
      ambient 0.35
      diffuse 0.7
      reflection 1
      brilliance 0.7
      }
    }
    rotate <-25, 40, 10> scale <0.6, 0.8, 0.6>  translate y*2
  }

camera {
  location <-2, 0, -15>
  angle 50
  look_at <-0.4, 2.9, 0>
  }

light_source { <500, 1000, -500> rgb 1 }

background { color rgb <0.05, 0.1, 0.2> }