Thorsten Froehlich <tho### [at] trfde> wrote:
> liuyang wrote:
> > I need the distance of each pixel to the camera in the rendered scene. Is
> > there a way to get it in Pov ray? I am doing an experiment to study the
> > relationship between luminance and distance in natural or simulated world,
> > so it is really important to know the exact distance and pixel
> > relationship. Does the z buffer or depth buffer give me this information?
>
> Yes it does give you this information, but POV-Ray does not use either
> because it is a ray-tracer. The same information is still computed, of
> course, but you would need to modify POV-Ray to extract this information for
> each pixel.
>
>  Thorsten

Thanks, but how to modify Pov-Ray to get it?

Yang

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