I found out it looks better/cooler with multiply on! Here's a pic of a new one I did with multiply:
I also found out a way to not have to download those brushes but still get a cool/good looking result, use the brush on size 25 and just draw random dots(dots not lines), then use the frosted glass effect with maximum radius at 30.00 and minimum radius at 0.00 and smoothness at 1.