POV-Ray : Newsgroups : povray.general : Depth map without hacks : Re: Depth map without hacks Server Time
2 Aug 2024 06:19:20 EDT (-0400)
  Re: Depth map without hacks  
From: Christoph Hormann
Date: 31 Dec 2004 08:25:01
Message: <cr3jnp$4tk$1@chho.imagico.de>
nfm wrote:
> Is this possible in POVRAY? A map with the depth of each pixel in the image,
> without the need of altering the input file like texture and light
> deletion, z-gradients etc. Thanks!

Short answer: no.

Long answer: MegaPOV offers access to the distance of the first 
intersection as part of the post processing patch but this requires a 
change in the scene file as well.  This is however no way the 'depth of 
a pixel' - in a raytracer this is not clearly defined at all since the 
contributions to the color of a pixel can come from different distances.

It is however quite convenient to generate a depth image with what you 
call 'hacks' simply using conditionals in SDL.

Christoph

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