Lutz-Peter Hooge wrote:

> Rick Measham <nomail@nomail> wrote:
> 
>>The ceiling in my office is white. And when it's light outside it looks
>>white (radiosity aside). However when I turn the light on and I look
>>directly at the light, the ceiling looks dark. I'm guessing this is because
>>my eyes are dilating due to the large amount of light pouring in.
>>
>>In POV-Ray, is it possible to automate this?
> 
> 
> IMHO it is not possible to automate it inside of Povray, since when it is
> is tracing Pixel (1,1) is does not yet know what brightness the rest of the 
> picture will have, so it can't compensate for it at this point.
> 
> So you will have to do this manually (most practical for still images),
> or with postprocessing.
> 
> For postprocessing, a version of Povray that doesn't clip colors and outputs
> to a high dynamic format range format obviously would be optimal, but I don't
> know if such a version is available.

It should be relatively easy to patch to support one of these formats.

Regards,
John

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