james lake nous illumina en ce 2008-05-14 19:41 -->
> "Tim Attwood" <tim### [at] comcastnet> wrote:
>> //----------------------------------------------------------------------
>> // A thin blue media, becoming lighter as it approaches
>> // the planet's surface.
>> //----------------------------------------------------------------------
>> #declare PlanetAtmosphere = sphere { <0,0,0>, 1
>>    hollow
>>    material {
>>       texture {
>>          pigment { rgbt <1,1,1,1> }
>>       }
>>       interior {
>>          media {
>>             emission <0,0,2>
>>             density {
>>                spherical
>>                color_map {
>>                   [0 rgb 0]
>>                   [0.05 rgb 1]
>>                   [1 rgb 1]
>>                }
>>             }
>>          }
>>          media {
>>             emission <2,2,0>
>>             density {
>>                spherical
>>                color_map {
>>                   [0 rgb 0]
>>                   [0.05 rgb 0.25]
>>                   [1 rgb 1]
>>                }
>>             }
>>          }
>>       }
>>    }
>>    scale 1.05
>> }
> 
> I tried this and it works, but now the Earth is a solid white sphere.  Is there
> another command that must accompany these?  Or should I change the settings?
> 
> Thanks for the help!
> 
> James Lake
> 
> 
You put that object around your earth, scaled 5% larger than the size of the 
earth sphere.

-- 
Alain
-------------------------------------------------
You know you've been raytracing too long when you've ever "lost" a Julia fractal 
because you're not quite sure how to align things in four dimensions.
Dylan Beattie

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