I'm trying to render some realistic cloud images in POV-Ray for use as
textures in an OpenGL program, and I made one that looks pretty good.  What
I'd like to do now is do something akin to changing the DNoise seed so I can
generate different clouds without making them any more or less turbulent.
How can I do that?

Thanks,
Aaron

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Wasn't it Aaron Plattner who wrote:
>I'm trying to render some realistic cloud images in POV-Ray for use as
>textures in an OpenGL program, and I made one that looks pretty good.  What
>I'd like to do now is do something akin to changing the DNoise seed so I can
>generate different clouds without making them any more or less turbulent.
>How can I do that?

If you're talking about a cloud pigment on a two dimensional surface,
then just translate the pigment in the third dimension. For example in
this complete scene, replace the 123 by any other number.

#include "textures.inc"

plane {z,10 
 pigment {Bright_Blue_Sky translate z*123}
 finish {ambient 1}
}

-- 
Mike Williams
Gentleman of Leisure

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Mike Williams wrote:
| Wasn't it Aaron Plattner who wrote:
|
|>I'm trying to render some realistic cloud images in POV-Ray for use as
|>textures in an OpenGL program, and I made one that looks pretty good.
  What
|>I'd like to do now is do something akin to changing the DNoise seed so
I can
|>generate different clouds without making them any more or less turbulent.
|>How can I do that?
|
|
| If you're talking about a cloud pigment on a two dimensional surface,
| then just translate the pigment in the third dimension. For example in
| this complete scene, replace the 123 by any other number.
|
| #include "textures.inc"
|
| plane {z,10
|  pigment {Bright_Blue_Sky translate z*123}
|  finish {ambient 1}
| }
|

Sorry, I meant media clouds using spherical density media with
turbulence.  I managed to get the effect I was looking for by
translating the media, applying the turbulence warp, and then
translating it back.

Aaron
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