#include "colors.inc"
#include "textures.inc"

global_settings {
	assumed_gamma 1.0
// *** Radiosity shows up the box surround ... *** //
	ambient_light 2.0 
    radiosity {
        count 500
        error_bound 0.2
        gray_threshold 0.2
        distance_maximum 40
        low_error_factor 0.7
        nearest_count 9
        minimum_reuse 0.01
        brightness 3.3
        recursion_limit 1
   }
}

// Set a color of the background (sky)
background { color red 0.1 green 0.3 blue 0.8 }

camera
{
  location  <2.0 , 13.0 ,-20.0>
  direction <0, 0, 1>
  look_at   <0.0 , 5.0 , 0.0>
}

plane { y, 0 pigment { White } }
plane { -z, -5 pigment { White } }

// *** This light is in the box that follows. *** //
light_source { 
	0 colour Magenta * 0.5
	media_attenuation on
	looks_like { sphere { 0, 0.1 pigment { Magenta } finish { Luminous } } }
	translate <3, 11, 0>
}

box {
	<-2, -1, -2>, <2, 12, 2>
	pigment { rgbf 1 }
	finish { ambient 0 diffuse 0 }
	interior {
		media {
			intervals 10
			scattering { 1, Yellow }
			samples 1, 10
			confidence 0.9999
			variance 1/1000
 			density {
				spherical
				colour_map {
					[0 rgb 0]
					[0.1 rgb 1]
				}
			}
			scale <2, 5, 2>
			translate <0, 5, 0>
		}
	}
	hollow
	translate <3, 0, 0>
}

// *** This light is above the box that follows. *** //
light_source { 
	0 colour Yellow * 0.5
	media_attenuation on
	looks_like { sphere { 0, 0.1 pigment { Yellow } finish { Luminous } } }
	translate <-3, 11, 0>
}

box {
	<-2, -1, -2>, <2, 10, 2>
	pigment { rgbf 1 }
	finish { ambient 0 diffuse 0 }
	interior {
		media {
			intervals 10
			scattering { 1, Magenta }
			samples 1, 10
			confidence 0.9999
			variance 1/1000
 			density {
				spherical
				colour_map {
					[0 rgb 0]
					[0.1 rgb 1]
				}
			}
			scale <2, 5, 2>
			translate <0, 5, 0>
		}
	}
	hollow
	translate <-3, 0, 0>
}