Play with this script in Megapov:
############################################################
#version unofficial MegaPov 1.21;

camera {
  location  <0.0, 2.0, -3.0>
  look_at   <0.0, 0.0,  0.0>
  right     x*image_width/image_height
}

background{color rgb 1}

#declare Exposure=10;
#declare Exposure_Gain=1.0;

global_settings {
  tone_mapping {
    function { Exposure_Gain - exp( -Exposure * x ) * Exposure_Gain }
  }
}

#declare Scene=union{
sphere{0,1}
plane{-y,1}
plane{x,1}
plane{z,1}
}
//#declare Samples=0; //toon
#declare Samples=1000; //occlusion
#declare Blur=1;
#declare Min=0;

#declare Material=material{
texture{
pigment {
projection {Scene
normal on
blur Blur,Samples}color_map {[0 rgb 1][1 rgb Min]}}
finish{ambient 1}
}}


object{Scene material{Material}}
############################################################

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Attachments:
Download 'm2.avi.dat' (670 KB)