// Sample scene.
    // povray image_indexed_textures_v38.pov +w900 +h700 +p +a +mv3.8
    global_settings { assumed_gamma 1 }
    #declare VarOrthoMult =
        3.0/max(image_width/image_height,image_height/image_width);
    #declare Camera01z = camera {
        orthographic
        location <0,0,-2>
        direction z
        right VarOrthoMult*x*max(1,image_width/image_height)
        up VarOrthoMult*y*max(1,image_height/image_width)
    }

    #include "functions.inc"

    #declare ImgIdxTxtrs = texture {
        material_map {

            function 45 35 {
                pigment {
                    user_defined {
                        function { x*(4/255) },
                        function { 0 },
                        function { 0 },
                        function { 0 },
                        function { 0 }
                    }
                }
            }

            map_type 0
            interpolate 3  // Acts on palette register / index entries too
                              // which is of 'iffy' usefulness...
            texture { pigment { rgb <0.05,0.05,0.05> } finish { emission 1 } }
            texture { pigment { rgb <1,0,0> } finish { emission 1 } }
            texture { pigment { rgb <0,1,0> } finish { emission 1 } }
            texture { pigment { rgb <0,0,1> } finish { emission 1 } }
            texture { pigment { rgb <1,1,1> } finish { emission 1 } }
        }
    }

    plane { -z, 0
        texture { ImgIdxTxtrs scale <1,-1,1>}
    }
    camera { Camera01z }

    sphere { <+0,0,0>, 0.02 pigment { rgb <1,0.5,0.1>} finish { emission 1.0 } }
    sphere { <+1,0,0>, 0.02 pigment { rgb <1,0.5,0.1>} finish { emission 1.0 } }
    sphere { <-1,0,0>, 0.02 pigment { rgb <1,0.5,0.1>} finish { emission 1.0 } }

    sphere { <+0,+1,0>, 0.02 pigment { rgb <1,0.5,0.1>} finish { emission 1.0 } }
    sphere { <+0,-1,0>, 0.02 pigment { rgb <1,0.5,0.1>} finish { emission 1.0 } }