>
> I know this is a very long time ago thread, but if it can be responded I want to
> know what is the pattern (density) of the cloud.

For the cloud shape itself, I use turbulence (and its 'omega' value) in the
media's density statement, to get the broken-up wispy look; although,
Kontemplator's use of the granite pattern (and no turbulence) is an interesting
way to do it too. The correct amount of turbulence/omega is really an artistic
decision-- whatever looks pleasing. It's difficult to say what the 'correct'
cloud shape should be.

Kirk Andrews' clouds in his original image posts here look quite sophisticated--
probably a *combination* of media types (scattering and absorption, maybe) as
well as scattering media for the overall atmosphere, to cast light-shadow rays.
His clouds look like they are scaled smaller in the y-axis (in other words, the
original spherical cloud shape was squashed down slightly) to make them look
more realistic.

This code is for one of my own typical clouds-- although I usually change
*something* every time I make one!

--------------
sphere{0,1
hollow on
texture{
    pigment {rgbt 1}
    finish {ambient 0 diffuse 1}
    }
    interior{
        media{
            scattering{1, 3.0 extinction 1.0}
            absorption 1.0
            method 3
            intervals 1
            samples 20
            density{
                spherical
                    color_map{
                            [0.22 rgb 0]
                            [0.32 rgb 1]
                            [1.0 rgb 1]
                             }
                   scale 2.5
                   warp{turbulence .8 omega .7}
                   scale 1/2.5
                   }
              }
             }
          scale <1,.6,1>
         }

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