RE: [Algorithms] Flexible particle system

[Ryan De B. <RD...@im...>]

I implemented rain by creating a plane in the sky which drops billboards
randomly which follow a direction modified by a random angle. Each
customizable property can be modified for a different effect.

Is there some guide to creating other effects like smoke? Some
implementations seem to rotate and get bigger (and look a bit fake), but
others seem so good it's hard to see how they are done. I read about
creating fractal/perlin noise and modifying the phase over time and
modulating with a circle fade and using emitters. Although that sounds
nice that was in 3dsmax and I'm not sure about the cost of that in
real-time. I was hoping to find a shader that does the noise and seeing
if the smoke looks any good.

-Ryan De Boer



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