Re: Clouds

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Alejandro Saez (cano++at++srv-exchange.computerland.cl)
Thu, 4 Feb 1999 17:19:50 -0600

On Feb 4, 1:54pm, Allen Rowe wrote:
> Subject: Clouds
> Hello,
>
> We have a requirement for the ability to simulate flying in and out of
> clouds. I am not talking about transition up into a cloud layer, but
> actually simulating "puffy" clouds which the pilot could fly in and out of.
>
> Has anyone done any work in this area, can it be done/modeled???
>
> Allen Rowe
> Veridian Engineering
>
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>-- End of excerpt from Allen Rowe

There is a company that has a product to simulate clouds, I just saw a
demonstration at ITSEC two years ago so I'm not sure it's what you need, check
out:

http://www.visidyne.com

You'll need Paradigm's Vega.

Other than that I can only say is not a trivial subject since clouds are of a
volumetric nature (can't be accurately modeled/rendered by means of a surface
representation) that being the main reason why they are being approached by
volumetric (particle based) rendering techniques. Each condensed water
particle making up the cloud actually reflects light, not just those on the
"surface" of it, making it a high albedo, semi transparent, volumetric and non
uniform object and of course a nice challenge for real time vis sim.

-- 
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Alejandro Saez
Software Engineer
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