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I think there's a typo in 3.4.7.9:
You should note two important facts: First, for Fade_Distance larger than
one the light intensity at distances smaller than Fade_Distance actually
increases. This is necessary to get the light source color if the distance
traveled equals the Fade_Distance. Second, only light coming directly from
light sources is attenuated. Reflected or refracted light is not attenuated
by distance.
The very first Fade_Distance should be Fade_Power, I believe. Let me know
if I'm incorrect, but it really doesn't make sense as is.
Bent
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