Alexander Nagel nous apporta ses lumieres en ce 2005-11-27 10:02:
> Hi all,
> i have a driving car in the desert. How can i make a dust cloud behind the
> car.
> I'm not so familiar with all texture possibilities and need a hint.
> I thought about a cone with a half transmission but it's too regular and
> really a cloud.
> thx
> Alex
> 
Another way: (normaly, you can't see individual particles in the dust cloud)
Start with an object with about the shape you want, a blob should be a good start.
Now, make it totaly transparent: texture{pigment{ rgbt 1}finish{ambient 0 diffuse 0}}
Make it hollow: add the "hollow" keyword.
Fill it with media. Make the media scathering. Try several pigments as density and add
some turbulence.
You can use the cone filled with media close to the tires and merge it with a blob
some distance 
away from the car.
Please note that scathering media is the slowest kind of media.
DON'T use high intervals value, increase the samples count instead. MUCH faster!
That's for the 
default media sampling method.
If the dust is to transparent, you can increase the density, one (1) is not the
maximum, there is no 
maximum.

-- 
Alain
-------------------------------------------------
It doesn’t matter what you do. It only matters what you say you’ve done and what
you’re going to do.

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