This is what I have got (see image).

Left render with Uberpov; Right render with Pov 3.7.

The only code difference is the emission value: In Uberpov it is 2; in 
POV-Ray it is 0.2. Higher values will white out the render. The 
difference remains and I think Clipka knows why :-)

This is the media code I used for both renders:

#declare SR = 200;

#declare Sun =
   sphere {
     <0,0,0>, 1
     pigment { rgbt 1}
     hollow
     interior {
       //ior 1.8
       media {
         method 3
         samples 100
         intervals 1
         //confidence 0.9
         emission 0.2	//change to 2 in Uberpov
         scattering {
           1, <0.1, 0.5, 1>*1000/SR
           //extinction  1.50
         }
         density {
           granite
           turbulence 0.85
           color_map {
             [0.00 rgb 0]
             [0.05 rgb 0]
             [0.20 rgb 0.2]
             [0.30 rgb 0.6]
             [0.40 rgb 0.8]
             [0.50 rgb 0.991]
             [0.60 rgb 0.8]
             [0.70 rgb 0.6]
             [0.80 rgb 0.2]
             [0.95 rgb 0]
             [1.00 rgb 0]
           }
         }
       }
     }
   }

object {
     Sun
     scale SR
     translate <0,0,0>
}



Thomas

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