2008

Left: Original scene
Right: Increasing the density
Max Light% Represents the maximum glow effect that you can achieve
(defaults to 90 percent). By turning this down, you can limit the brightness
of the glow so that it doesn't get denser and denser as it gets farther away from
the light and "whites out."
NOTE When your scene includes transparent objects inside a volume light, set
Max Light to 100 percent.
Min Light% Similar to an ambient light on page 7710 setting. If Min Light%
is greater than 0, areas outside the light volume will glow also. Note that this
means areas of open space (where the light ray can travel forever) will end up
the same as the fog color (just as with normal fog).
Without objects behind the fog, the scene will always be as bright as the fog
color if the Min Light% is greater than 0 (no matter what the actual value is).
This is because the fog goes to infinity and is accumulated infinitely. If you're
going to use min light% values greater than 0, you should make sure that you
enclose your scene by geometry.
Atten. Mult. (Attenuation Multiplier) Adjusts the effect of the attenuation
color.
Filter Shadows Allows you to get better quality volume-light rendering by
increasing the sampling rate (at the cost of some increased rendering time).
These are the options:
6526 | Chapter 19 Effects and Environments