This is some RnD I did a little while back. Generic Snow elements to be used in various shots. First setups is Fumefx driven and much like pyroclastic ash. The fume was simulated low res and pretty fast, then re-timed to 1/4 of it's speed to give some better scale and overall feel. Rest of the setups is custom Box#3 random Walkers that give rather nice motion that i personally like better then using BetterWind at times...
Windshield wiper teapot was done just for fun as proof of concept.
The final spot can be viewed here:
youtube.com/user/TNTlatam?blend=9&ob=5#p/u/5/h8Z2bC8Vo8M
Shot03 and the final wide shot use it.

EDIT: Vimeo's compression killed a lot of detail...

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