light_source {
  0*x                 // light's position (translated below)
  color rgb 2.0       // light's color
  area_light
  <20, 0, 0> <0, 0, 20> // lights spread out across this distance (x * z)
  4, 4                // total number of lights in grid (4x*4z = 16 lights)
  adaptive 0          // 0,1,2,3...
  jitter              // adds random softening of light
  //circular            // make the shape of the light circular
  //orient              // orient light
  translate <40, 40, -40>   // <x y z> position of light
}


plane {
  y,
  0.0
  hollow on
  material {
   texture {
     pigment {
       rgb <1.00, 0.95, 0.90>
     }
   }
  }
  finish { 
    diffuse .1
    specular 1 
    roughness .001
    reflection 0.3
    crand 0.02
    diffuse 0.5
  }
} 

#if (off)
  #local Fn =
  function { pigment { image_map {png "dg.png" }} };
  box {
    < 0.00,  0.00001,   0.15>  // one corner position <X1 Y1 Z1>
    < 5.76,  4.08,     -0.05>  // other corner position <X2 Y2 Z2> 
    hollow on
    texture { pigment {rgbt 1} finish{diffuse 0 ambient 0 specular 0}}
    interior {
      media {
      	scattering{1, 1 extinction 1.5}
        intervals 1
        samples 20
        method 3
        density {             
           function { Fn(x,y,z).x  }
           density_map {
                   [0 rgb 0]
                   [1 rgb 1]
           }
           scale <5.76, 4.08, 1>
        }  
      }       
    }
  }
#else 
  height_field {
    png "dg.png"
    water_level .1 
    pigment{rgb 1}
    scale <5.76,.1,4.08>
    rotate x*-90
  }
#end