Forests: so simple they hurt (GIMP)

[Lathorien]

You can achieve the same results using a small round brush (i prefer soft edge) with max scatter and green, paint where you want and bump map, easier than the pixilate and blur i think

[VincentAlliath]

Easier, yes, but I prefer this way since it gives effects that I like and allows the forests to grow into a more "realistic" style of random than doing it mostly myself.