I've got some serious issues with painting good looking undergrowth, general foliage and trees in Photoshop. I tried dozens of "foliage" brushes, played around with brush settings, color dynamics etc. but I can't seem to get this easy randomness that comes with using wide brushes in traditional media.
What I'm looking for is basically this (link do a video). What I'm missing is first of all proper brushes. Any advice?