>I don't know if a logarithmic scale would be useful given the limited
>dynamic range of monitors and typical depth resolutions (usually 8 bits
>per component, for 255 non-black levels). Also, people who work with
>color learn to use linear values, they would have to re-learn everything
>to use a logarithmic color space. It isn't more "correct", it is just a
>different system.

It is useful because realistic radiosity requires real luminances.

Matti

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