> But obviously PoV-Ray does not take this into account when rendering
> such indoor scenes... or is there a way to calibrate PoV-Ray's lighting
> system to match the human perception more closely?

You don't want to do that, because when your eye looks at the monitor/print 
out obviously it will do it's logarithmic processing again, so you'll get it 
twice and it will look weird.  Try taking a photo of the view you want with 
the exposure you want, and getting your POV generated image to match.

IME the most important thing is to get the ratio between sun brightness and 
sky brightness correct.  Once you have that sorted then everything else will 
just work, and you can scale the sun and sky brightness equally to get 
different exposures (eg for indoor scenes or outdoor scenes).  Again, you 
can check the ratio by comparing sunlit/shadow parts of your rendering with 
a photo.

Buy.

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