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"And" <49341109@ntnu.edu.tw> wrote:
> "Kenneth" <kdw### [at] gmail com> 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
I'm surprised at the result, it's good enough. I composed it with a scene.
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