File:Toroid core.png

#declare RAD = on ;
#include "colors.inc"

global_settings {
  #if(RAD)
    radiosity {
      brightness 0.60 
      count 100
      error_bound 0.2
      gray_threshold 0.0
      low_error_factor 0.2
      minimum_reuse 0.015
      nearest_count 10
      recursion_limit 1
      #if (version>3.1)
        adc_bailout 0.01
        max_sample -1.0
        media off
        normal off
        always_sample 1
        pretrace_start 0.08
        pretrace_end 0.01
      #end
    }
  #end
}

background { color White }

lathe { 
  bezier_spline
  32
  <1.2,0>,<1.3,0>,<1.7,0>,<1.8,0>,
  <1.8,0>,<1.9,0>,<2,0.1>,<2,0.2>,
  <2,0.2>,<2,0.3>,<2,1.2>,<2,1.3>,
  <2,1.3>,<2,1.4>,<1.9,1.5>,<1.8,1.5>,
  <1.8,1.5>,<1.9,1.5>,<1.3,1.5>,<1.2,1.5>,
  <1.2,1.5>,<1.1,1.5>,<1,1.4>,<1,1.3>,
  <1,1.3>,<1,1.2>,<1,0.3>,<1,0.2>,
  <1,0.2>,<1,0.1>,<1.1,0>,<1.2,0>
  rotate <-10,0, 0>
  finish {
    #if(RAD) 
      ambient 0
      diffuse 0.7 
    #else
      ambient 0.2 
      diffuse 0.5      
    #end   
    phong 1
    phong_size 60
  } 
  pigment { Gray } 
}
light_source { <2, 4, -3> color White}
camera {location <1,8,-15> look_at <0,0.55,0> angle 16 }