D'oh! I didn't realize that you could have multiple media statements inside
an interior declaration. Your technique works so much better... and renders
orders of magnitude faster.

http://www.scottgammans.com/cgi_enterprise/scattering_media.jpg
http://www.scottgammans.com/cgi_enterprise/emitting_media.jpg

That first render using scattering media took nearly two hours to complete,
didn't look right, and didn't use anti-aliasing. The second render using
emitting media took less than 2 minutes to complete, looks SO much closer to
what I am trying to achieve, and even threw in AA 0.3 for good measure.

Those damn Bussard collector domes have been giving me fits... your advice
was right on target. Thanks Christopher!! :)

--Scott Gammans

"Christopher James Huff" <chr### [at] maccom> wrote in message
news:chr### [at] netplexaussieorg...
> In article <3c878cca$1@news.povray.org>,
>  "Scott Gammans" <nos### [at] yahoocom> wrote:
> For such a simple effect, you don't really need scattering media, you
> should do fine with emitting media and a spherical density, which will
> be faster. The grainy look is caused by the sampling method, you can
> reduce it by using more samples, or use method 2 or 3 in MegaPOV or
> POV-Ray 3.5.

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