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The tutorial is on how to create a "pseudo" particle stream using Plexus. I say pseudo because it's not really a particle stream, it just appears as one. The tools involved are Cinema 4d and After Effects with these 3rd party plugins: Plexus, Trapcode Particular and VCP Optical Flares although Particular and Optical Flares could be substituted with Particle World and any lens flare but I used particular and optical flares in the tut.