I've experiencing a flicker using CC Particle World and don't know why. I'm using Textured QuadPolygon with a custom texture, but it's just a single one of these "particles" you see in this video. When I change Particle Type to something else I still get the flicker. It's as if the effect can't decide where the particles are in z-space and keeps adjusting z-position.
I've experienced the same thing myself. It takes a boatload of tweaking Particle World's settings to minimize it. I was never able to entirely eliminate it. At some point, there was just so much happening on the screen that the viewer had to look ling & hard to see the problem.
I wish I could tell you which properties I tweaked, but I don't remember.
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA