// CYLINDERS / No.5 '06.03
// by Tsutomu HIGO  URL:http://www.asahi-net.or.jp/~nj2t-hg/

#version 3.6;
global_settings {
  max_trace_level 6
  assumed_gamma 2.2
  }

camera {
  location <0, 10, -500>
  look_at <-10, 0, 0>
  angle 100
  }

light_source {<20, 60, -170> color rgb <0.5, 1, 0.7>}

union {
  #declare Imax=150;
  #declare I=Imax;
  #while (I>0)
    cylinder { <0, 3000, 0>, <0, 0, 0>, 150 open
      scale pow(0.9, Imax-I)
      }
  #declare I=I-1; #end
  texture {
    pigment {color rgbt <1, 1, 1, 1>}
    finish {
      ambient 0.1
      diffuse 1
      reflection 0.2
      specular 0.8
      phong 0.3
      brilliance 1
      }
    }
  rotate x*-90
  no_shadow
  }