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Fog is a constant effect that doesn't take into account any lights. Only
way to get beams of light is to use a scattering media. The good news is
that you can set media_attenuation for each light and if you only set it for
spotlights, the scattering will be confined to the light beam, especially so
if the extinction is set to 0. It's a good idea if using media in a room to
confine the media to a box of approximately the same size as the room.
You can get an absorption media to cast shadows by setting filter to 1 in
the container object, which is faster than scattering, though the shadows
are limited to those cast by the media. In other words, no fancy lighting
effects.
-Mike
G-SUS wrote:
> Hi.. I was thinking why in the docs the use of media_attenuation with
> fog (not media) is mentioned.. is it possible to create light streams
> (like from spolights in a dusty area) with the use of fog and
> media_attenuation only? or do i have to use media always? (which takes a
> LOAD of time on my cpu with an interval value above 20 ;) )..
>
> Hope reading from you...
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