// Sample scene. 'yuqk crackle.pov +w800 +h800 +p +mv3.8'
    global_settings { assumed_gamma 1.0 }
    #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)
    }
    #declare Fn = function { pattern { crackle } }
    plane { -z 0
        texture {
            pigment {
                crackle

                #if (frame_number=1)
                    ip_solid           on
                       noise_generator 1
                    ip_repeat          <0,0,0>
                    ip_strength        <1,1,1>
                    ip_raw_return      on
                    ip_offset          -0.5

                    function_interval
                    frequency 3.0
                  //inverse

                    scale 1/3
                #end
                #if (frame_number=2)
                    ip_solid           on
                       noise_generator 2
                    ip_repeat          <0,0,0>
                    ip_strength        <1,1,1>
                    ip_raw_return      on
                    ip_offset          -0.5

                    function_interval
                    frequency 3.0
                  //inverse

                    scale 1/3
                #end
                #if (frame_number=3)
                    ip_solid           on
                       noise_generator 3
                    ip_repeat          <0,0,0>
                    ip_strength        <1,1,1>
                    ip_raw_return      on
                    ip_offset          -0.5

                    function_interval
                    frequency 3.0
                  //inverse

                    scale 1/3
                #end
                #if (frame_number=4)
                    ip_solid           on
                       noise_generator 1
                    ip_repeat          <0,0,0>
                    ip_strength        <0,0,0>
                    ip_raw_return      on
                    ip_offset          -0.5

                    function_interval
                    frequency 3.0
                  //inverse

                    scale 1/3
                #end
                #if (frame_number=5)
                    ip_solid           on
                       noise_generator 2
                    ip_repeat          <0,0,0>
                    ip_strength        <0,0,0>
                    ip_raw_return      on
                    ip_offset          -0.5

                    function_interval
                    frequency 3.0
                  //inverse

                    scale 1/3
                #end
                #if (frame_number=6)
                    ip_solid           on
                       noise_generator 3
                    ip_repeat          <0,0,0>
                    ip_strength        <0,0,0>
                    ip_raw_return      on
                    ip_offset          -0.5

                    function_interval
                    frequency 3.0
                  //inverse

                    scale 1/3
                #end
                #if (frame_number=7)
                    ip_solid           on
                       noise_generator 1
                    ip_repeat          <0,0,0>
                    ip_strength        <0.5,0,0>
                    ip_raw_return      on
                    ip_offset          -0.5

                    function_interval
                    frequency 33.0
                  //inverse

                    scale 1/3
                #end
                #if (frame_number=8)
                    ip_solid           on
                       noise_generator 2
                    ip_repeat          <0,0,0>
                    ip_strength        <0,2,0>
                    ip_raw_return      on
                    ip_offset          -0.5

                    function_interval
                    frequency 33.0
                  //inverse

                    scale 1/3
                #end
                #if (frame_number=9)
                    ip_solid           on
                       noise_generator 3
                    ip_repeat          <2,2,0>
                    ip_strength        <0,0,0.7>
                    ip_raw_return      on
                    ip_offset          -0.5

                    function_interval
                    frequency 33.0
                  //inverse

                    scale 1/3
                #end

                color_map {
                    [-1    rgb <1,0,0>]
                    [-0.02 rgb <1,1,0>]
                    [+0.02 rgb <1,1,0>]
                    [+1    rgb <0,1,0>]
                }
            }
            finish { emission 1 }
        }
        texture {
            pigment { function { Fn(x,y,z) } scale 1/44
                color_map {
                    [-1    rgbt <1,1,1,0.25>]
                    [-0.02 rgbt <1,1,0,1.0>]
                    [+0.02 rgbt <1,1,0,1.0>]
                    [+1    rgbt <0,0,0,0.25>]
                }
            }
            finish { emission 1 }
        }
    }
    camera { Camera01z }