I have also posted this query in odforce in case somone knows the answer and doesnt visit that forum often.

http://forums.odforce.net/index.php?/topic/11641-rendering-tornadoes-using-houdini/ [forums.odforce.net]


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I am working on a tornado simulation and wanting to render particles as volumes? I have been trying a few techniques such as copying geometry to the particles with an isoOffset node and rest node attached and applying a billowy smoke shader but I can see the noise swimming across the textures. Not sure whether that is noise or shadows. I have seen a couple examples in the past where you export the particle data to 3ds max and render it. I have no experience with max and would like to stick to houdini to make things a little simpler.
Is there a better technique to this in houdini?
My goal is to render tornadoes as clouds with self shadows.
I am also attaching my renders as a movie files.

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thanks,