"Tim Attwood"  wrote in message <481e48b0$1@news.povray.org>:
> There are saturation issues if you use bright lights

Of course. I explicitly excluded these case in my original question.

My goal is to make the scene dimmer than it should be, and then post-process
it to simulate glare effects.

>						 Also there are
> gamma correction issues...

As I wrote, I intend to put both scene gamma and output gamma to 1.

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