mrdoob/three.js — Issue #1045: ParticleSystem transparency issue with sprite 
Author: chrismo
Created: 2012-01-07 22:57:13+00:00
State: open

http://clabs.org/three/depth.html

At various times with the three systems rendered I'm seeing depth problems with the transparent portion of the sprites. It gets worse the more I systems I add to the scene. Seems to be mostly fine with only two, though sometimes the orientation influences this. I'm still pretty new with the library, so I may just have some settings wrong, but everything I've tinkered with doesn't seem to help.