|  |  |  |  |  |  |  |  |  | algorithm: 
 
 1   Start with a complex picture of a museum space with three different lighted compartments.
 
 2   Squeeze and crop the image to make it square.
 
 3   Devide the image into three vertical layers following the compartments.
 
 4   Change the lighting of each layer separately.
 
 5   Make the complete image full of suspense and at the same time credible and real.
 
 
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