hi

if you're still looking for a solution to the forest brush problem - I created 3 brushes to do it (in Photoshop)

you can see the method and results here

basically:

1: create 3 brushes - you can make one and delete areas for the other two



2: draw the front of your forest:



3: select your side brush and draw in one side, flip the brush and draw the other:



4: get the top brush and fill in the rest:



add a few of the first brush scattered about if you fancy:



repeat about your map where you like...