//#version unofficial Megapov 0.6;
#version unofficial megapov 1.1;
#include "colors.inc" 
#include "stones.inc"

#declare phd = 2;

global_settings {
 //ini_option "+QR"
 //ini_option "Preview_Start_Size=32"
 //ini_option "Preview_End_Size=1"
 ambient_light 1
 max_trace_level 1000
  photons {
  #if(1)
   gather 20, 300
    radius .3*phd*sqrt(20)/2
    autostop 0
    jitter .2
  #else
   gather 20, 300
   radius .3*phd*sqrt(20)/1
   autostop 0
  #end
  } 

 /*photons {  
  gather 60, 300 //steps 3
  spacing 0.2 count 10000
  media 1000 ,8   
  //adc_bailout 0.01/2
  autostop 1   
  //expand_thresholds <percent_increase>, <expand_min>  
  //radius 0.5
 }
 radiosity {
  brightness 1 count 130
  distance_maximum 10    
  error_bound 0.25
  recursion_limit 16
  low_error_factor 0.2
  nearest_count 10
  gray_threshold 0.0
  minimum_reuse 0.015
  max_sample 2
  adc_bailout 0.01/2
 }*/
}

camera { location <0,15,0> look_at <0,5,0> }

light_source { 
 <0,10,-4> 
  color White 
  photons {    
   //global 0.25   
   refraction on    
   reflection on  
  }
 }
 /*
light_source { 
 <150,5,-300> 
  color White 
  photons {    
   //global    
   refraction on    
   reflection on  
  }
}

light_source { 
 <-150,50,-100> 
  color White 
  photons {    
   //global    
   refraction on    
   reflection on  
  }
 }
 
light_source { 
 <-150,-500,100> 
  color White 
  photons {    
   //global    
   refraction on    
   reflection on  
  } 
 }
       */
#declare B1 = 
 union {
   
#declare R = 1;
 #while (R < 10)
 
 cylinder {
  y*0,y*1,0.5*R         
   translate <0,R*0.25,0>
   photons {    
    target 0.01*phd       
    reflection on  
    refraction on
   }
  }

 #declare R = R + 1;
#end

}

difference {
 object {
  B1
  texture {
   pigment {
    color rgb <0.7,0.7,0.7>
   }
  }
 } 
 
 object {
  B1
  texture {
   pigment {
    color rgb <0.7,0.7,0.7>
   }
  }
  translate <0,0.2,0>
 }
}   

object {
 B1        
 pigment {
  color rgbf <1, 1, 1, 1>
 } 
 finish {
  conserve_energy
  phong 1 
  phong_size 90 
  diffuse 0
  reflection .2
 } 
 normal {
  ripples 
   //scale 3000 
   frequency 4
   }
   interior { 
    ior 1.33
     media {
      absorption .1 
      samples 2, 2
     }
    }
    hollow             
    scale <1.0001,1.0001,1.0001>
    translate <0,0.1,0>
    photons {    
     target 0.01*phd   
     refraction on    
     reflection on  
     //ignore_photons
    }
   }