global_settings {
 ambient_light rgb 0.2
 assumed_gamma 1.8
 max_intersections 64
 max_trace_level 15
 adc_bailout 1/256
 radiosity {
  pretrace_start 1.00           // start pretrace at this size
  pretrace_end   0.0075           // end pretrace at this size
  count 35 // 100 for final
  nearest_count 8               // higher -> higher quality (1..10) [5]
  error_bound 1.0               // higher -> smoother, less accurate [1.8]
  recursion_limit 1 // 2 for final
  low_error_factor 0.5           // reduce error_bound during last pretrace step
  gray_threshold 0.0            // increase for weakening colors (0..1) [0]
  minimum_reuse 0.015           // reuse of old radiosity samples [0.015]
  brightness 1.0                  // brightness of radiosity effects (0..1) [1]
  adc_bailout 0.005
  normal on                   // take surface normals into account [off]
  media on                    // take media into account [off]
  //save_file "file_name"       // save radiosity data
  //load_file "file_name"       // load saved radiosity data
  //always_sample off           // turn sampling in final trace off [on]
  max_sample 1.0              // maximum brightness of samples
 }
}

//background {<0.451399, 0.579652, 0.698039>}
sky_sphere{
 pigment{
  function{ abs(y) }
  color_map{
   [0.0 rgb <1,1,1>]
   [0.1 rgb <0.6,0.7,1.0>]
   [0.7 rgb <0.0,0.25,0.8>]
  }
 }
}

plane{
 y,0
 hollow
 pigment{
  bozo
  turbulence 0.6
   octaves 8
   lambda 3.65
   omega 0.35
  warp{
   turbulence 0.8
    octaves 8
    lambda 3.85
    omega 0.5
  }
  color_map{
   [ 0 color rgbft <1,1,1,0,1> ]
   [ 0.5 color rgbft <1,1,1,0.05,1> ]
   [ 1 color rgbft <1,1,1,0.1,0>]
  }
 }
 finish{
  ambient 2
  diffuse 1
  brilliance 0
  reflection 0
 }
 scale 800
 translate <0,600,0>
}

camera {
 perspective
 location <7.47,-1.3,-8.67>
 right -x*image_width/image_height
 look_at <0, 0, 0>
 angle 58
}

light_source { 
 <55,17,-90>*10 
 rgb <1.0,1.0,1.0>*1.5
 /*
 area_light <1,0,0>,<0,1,0>,3,3
  circular
  orient
  adaptive 1
 */
 parallel
  point_at 0
 fade_distance 1000
  fade_power 2
 media_interaction on
 media_attenuation on
 looks_like{
  sphere{
   0,5
   pigment{
    color rgb 1
   }
   finish{
    ambient 1
    diffuse 1
    brilliance 0
    reflection 0
    specular 0
   }
  }
 }
 photons{
  reflection on
  refraction on
  //area_light
 }
}

// mesh...