The Point for the media_interaction parameter is that
you can exclude some of your light sources from the media computing
process, let's say you have a scene with one primary light ( The Sun )
and you have an media object ( some clouds ) and then you have many other
lights, with fade_power and distance assigned, which never reach the clouds,
then you can turn the media_interaction for those lightsources off to get
faster rendering times.

i think thats the only reason this feature exists.

by the way does anybody know how to turn off recieving shadows
with scattering media ?

greetings Lars

Margus Ramst schrieb in Nachricht <3710d9fd.0@news.povray.org>...
>Perhaps I'm suffering from an intellectual low here... I'll let you decide.
>
>Excerpt from the docs:
>
>Normally light coming from light sources is not influenced by fog or
>atmospheric media. This can be changed by turning the media_attenuation on
>for a given light source on. All light coming from this light source will
>now be diminished as it travels through the fog or media.
>
>The way I understand this, media should not cast shadows unless I turn
>media_attenuation on. Much to my surprise, I discovered this to be
>incorrect - absorbing media always casts shadows (unless the container
>object uses transmit). I'm suddenly puzzled as to the meaning and use of
>media_attenuation.
>
>Please enlighten me...
>
>Margus
>
>
>
>

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