I need an animated steam mat. Basically it needs to be steam rising, as if from a vent, and fading to black (by black I meant full black, so it can be transparent at the top) It also needs to loop correctly. Any help would be appreciated.

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You underestimate the power of the dark side...

You know what would be really cool - make it as a partical stream.

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"Sometimes nothing can be a real cool hand."
Have Lightsaber Will Travel

I considered that, but I'm looking for something that has a bit more detail.

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You underestimate the power of the dark side...