do you have to have scattering media?  personally, due to render time, i
try to work around it.  i have a post somewhere about using emitting
media in either a gradient or a plane pattern so only the light side is
lit.  i also have some pretty good cloud action going on although i
don't think i posted my final clouds.  maybe i should.  to imagine what
i ended up with, take my last xwing pic (i think the post was called
'hope you aren't tired of these yet') and where it looks like the clouds
are too bright and smooth, they are now puffy all over.

Darcy Johnston wrote:
> 
> I've run into something I was wondering if someone might be able to explain.
> I'm creating planets using image maps form SWMA. I want to have my clouds on
> a spearate sphere so that I can have shadows from the clouds for close ups.
> My problem is that if I use media as my atmosphere (using scattering and
> absorbtion), the atmosphere doesn't tail off the way it should if I use a
> 2nd sphere for my clouds, but works fine if I just used a layered texture.
> 
> I've attached an example, where the only difference between the images is
> that planet1.jpg has the clouds as just another in my surface texture, and
> planet2.jpg has the clouds as a seperate sphere which is only slightly
> larger in radius (1 vs 1.0001).
> 
> Thanks,
> Darcy
> 
>  [Image]
> 
>  [Image]

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