Done with Maya fluids in 2009. Fluid was sampled 24 fps with 2 steps per frame (48 fps really) and had a resolution of 5.6 million voxels.

Scene file in this thread:
forums.cgsociety.org/showthread.php?f=86&t=817273

Reference:
i410.photobucket.com/albums/pp186/ruchitinfushion/Smoke_bomb5.jpg?t=1255943262

-shawn

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