povray chess

#version 3.6;
global_settings{ assumed_gamma 1.0 }
#default{ finish{ ambient 0.1 diffuse 0.9 }}

#include "colors.inc"
#include "textures.inc"
#include "glass.inc"
#include "metals.inc"
#include "golds.inc"
#include "stones.inc"
#include "woods.inc"
#include "shapes.inc"
#include "shapes2.inc"
#include "functions.inc"
#include "math.inc"
#include "transforms.inc"

#declare Camera_0 = camera { angle 70
                            location  <0.0 , 1.0 ,-2.0>
                            right     x*image_width/image_height
                            look_at   <0.0 , 0.2 , 0.0>}
#declare Camera_1 = camera { angle 90
                            location  <2.0 , 2.5 ,-3.0>
                            right     x*image_width/image_height
                            look_at   <0.0 , 1.0 , 0.0>}
#declare Camera_2 = camera { angle 90
                            location  <3.0 , 1.0 , 0.0>
                            right     x*image_width/image_height
                            look_at   <0.0 , 1.0 , 0.0>}
#declare Camera_3 = camera { angle 90
                            location  <0.0 , 3.0 ,-0.001>
                            right     x*image_width/image_height
                            look_at   <0.0 , 1.0 , 0.0>}
camera{Camera_0}

light_source{<-1500,2500,-2500> color White}


plane{<0,1,0>,1 hollow
       texture{ pigment{ bozo turbulence 0.92
                         color_map { [0.00 rgb <0.20, 0.20, 1.0>*0.9]
                                     [0.50 rgb <0.20, 0.20, 1.0>*0.9]
                                     [0.70 rgb <1,1,1>]
                                     [0.85 rgb <0.25,0.25,0.25>]
                                     [1.0 rgb <0.5,0.5,0.5>]}
                        scale<1,1,1.5>*2.5  translate< -1.25,0,0>
                       }
                finish {ambient 1 diffuse 0} }
       scale 10000}

fog { fog_type   2
      distance   20
      color      <1.00,0.98,0.9>
      fog_offset 0.1
      fog_alt    1
      turbulence 1.8
    }

plane{ <0,1,0>, 0
       texture{ pigment{ color rgb <1.00,0.95,0.8>*0.8}
                normal { bumps 0.75 scale 0.0125  }
                finish { phong 0.1 }
              }
     }

#declare Chessboard =
union{
box { <-1.01, 0.00, -1.01>,< 1.01, 0.049, 1.01>
      texture{ pigment{ color rgb< 0.75, 0.5, 0.30>*0.5 }
             }
    }
box { <-1.00, 0.00, -1.00>,< 1.00, 0.05, 1.00>
      texture{ pigment{ checker color rgb<1,1,1> color rgb<0,0,0> }
               scale 0.25
             }
    }
}


object{ Chessboard
        scale 1
        rotate<-25,30,0>
        translate<0.05,0.6,0>
      }