I may be mistaken, but in experimenting with scattering media, it seems to me
that sampling method 3 fails to properly attenuate the light scattered to the
observer, leading to what I think is overly bright media when e.g. viewing a
media-based ground fog at a shallow angle.
Another thing that worries me is that the illumination of scattering media does
not seem to take into account extinction effects from the very same media - or
at least I wasn't able to dig up the code that does it.
Anyone can confirm / disprove this?
I'll try to draft some test scenes for the two issues.
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