How can i do that?

[Justin Productions]

Is it me, I don’t quite remember and I’m too lazy to go check, but I think this feature is in Trapcode Particular 1.5 (upgrade). I remember seing something like this.

Justin Productions
Tangerin01@hotmail.com
Adobe After Effects 6.5 Professional

[Fabiano Peres]

Yes, he’s right.
Trapcode particular has made a great job at this plugin, If you don’t have it yet go to http://www.trapcode.com and take a look at it, there are video tutorials that will show you how to make it.
But if you cannot afford it, you can use “Particles playground” from After effects, create a mask the shape you want the particles to go and at “Wall- bondary” select the mask as a path, it’s not so realistic as trapcode particular but…

[Roland R. kahlenberg]

With Particle Playground, you should look into the particle emitter’s position, the use of a Wall (using a closed mask shape), gravity and Kinetic Friction (under persistent property mapper).

Take a look at my particle playground tutorial here at the COW – Fun in Particle Playground Land for insights into, particle emitter position, Wall and kinetic friction.

Cheers
Roland Kahlenberg
broadcastGEMs
customizable animated backdrops with Adobe After Effects project files