CC Particle World is included with AE and provides 3D particle generation. It's not nearly as sophisticated as Trapcode Particular, but is probably the next best thing.
And there's always Particle Playground.... ::shivers::
When you say "3D particles from default existing particles" -- what are you talking about exactly?
Most particle systems use 2D sprites that face the camera so they appear spherical no matter where the camera is. Motion is no different.
Dan makes my head hurt.
Thanks for that link, what a great exercise in expressions and theory!
What kind of particles :
I have this very nice text i created. I want the floor to either be water or a group of slightly moving, thick/wide diameter strands that make a floor. I will be moving a cam slowly throughout the 6sec.scene. when the camera moves i want the depth of these strands to be appreciated.
It is a 3d scene but i only need the floor to be a illusional 3d object.The grey area is where i want the 3d strands going out into z space.
The more i look at this the more i wonder if i could animate the surface of some skinny tall can created in PS. Then just lay them beside each other with a timing offset on each.
I am trying to mimic a Willy Wonka styled water with these strands. They should look like both water and liquorish at the same time. IF that makes since to anyone.
I'm not sure what you mean by water and licorice. If you want to have lines in AE that clearly have depth to them, you cannot get it without 3rd party plugins. I know that Form from Trapcode can give you lines undulating as if they were ocean waves. You just base it on a grid (or series of lines) have tons of particles and displace them with the fractal. I am using that effect in a graphic I'm creating for a US Army special operations group.
If you want photorealistic water, you can't go wrong with the Psunami plugin from Red Giant.
However, without third party plug-ins there are ways to fake it or get other interesting effects, depending on what you want.
Here's a way to get AE's layers moving like ocean waves. (This is a great tut!)
Here's flowing 3d-looking lines in AE.
Here's fake ocean