As a follow-up to my volumetric fractal noise cloud - vimeo.com/24922196 - I've done a version using Trapcode Particular. This looks very different and gives a good indication of the difference of the two approaches.

Again, the project file is free to download and use under a CC license from the Digital Distortion website:
digitaldistortion.net/rsrc_3dParticularCloud.html

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