I am currently trying to accurately model the sun.  I am have had the best
success using a media filled sphere with a light in it's center.  This works
wonderfully when set to type 5 with eccentricity 0.75, but when you scale
this to a large enough sphere to be seen at long distances, about a radius
of 300 at 1000 away, the edges appear black against the sky and do not blend
well at all. Here is the code I am using:

#declare Sun=material{texture{pigment{color rgbf<1,0.8,0.6,1>}
finish{ambient 1.0}}
  interior{media{intervals 200 samples 1,100 scattering{5,
rgb<0.25,0.25,0.25> eccentricity 0.75}}}
  }

Any ideas on how to make it so it is not so dark around the edges?

--Thanks,
T'vakah

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A small project I am working on now:
http://backdoor.to/edertav/

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