I noticed that the outer edges of the simulation window could be filled with walls (except for the bottom and right sides) , but powder could only reach 4 px away from the edges? Is there a reason for this?
I didn't know which forum to put this into, since it's not really a suggestion, so I just put it in help.
yeah, I've noticed that, but free particles cannot actually be held on it (or stopped by it if its on the sides or top). Particles just disappear when they reach it...