"Kenneth" <kdw### [at] gmailcom> wrote:
> >
> > 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


In fact I mean  Bruno Cabasson's image.


> 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>
>          }



I will try

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