[Pbrt-discuss] Getting Scene Depth

[Sujit Kuthirummal]

Hi
  
     I want to render a scene as seen through some glass geometry (say a glass sphere). 
  I was wondering whether its possible to get the scene point associated  with every image pixel, i.e. I want to find out which scene point  (x,y,z) is imaged at pixel (i,j).
     Is there some simple way to get this information?
  
  Thanks in advance!
  
  Regards
  Sujit
  
  
  
		
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