Thanks Ken, that's helped somewhat, although I still have a related
problem.
I'm modelling a room with a large hole in the roof, through which my
spotlight is shining and interacting with the atmosphere in the room. The
problem is that I also have a sky_sphere, but it disappears as soon the
media is activated. Basically, I can't see through and 'out of' the media.
    I have tried enclosing the media in a hollow box the same size as the
room, but the problem persists. The media is working within the room just
how I want it, but I want to be able to see the sky.
    Any ideas would be appreciated,

Thanks,
Andy.

Ken wrote in message <367### [at] pacbellnet>...

>Here are a couple of examples of using scattering
>media. It would work best if used with spot light
>sources but will work with point lites as well.
>
>
>This first one is fairly weak but effective. It will
>depend on how much light there is in the scene as too
>how well it will work. If you put it in sunlight don't
>expect much but snow blindness. I will also be distance
>sensitive.
>
>media{
> intervals 10
>  scattering{1,rgb .03}
>   samples 1,10
>   confidence .9999
>  variance 1/1000
> ratio .9
>}
>
>
>This second one will add a little more haze to the
>scene than the first but between the two maybe you
>can figure our which way to go.
>
>media{
> intervals 40
>  scattering{1, rgb .02}
>   samples 1,10
>   confidence .9999
>  variance 1/1000
> ratio .9
>}
>
>
>Ken Tyler

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