For my Opacity Maps I played mostly with the brushes that i used to make my “grass”. I went for kind of a old, dead look for my grass, so my opacity map painted over some of the edges and around where the grass would be black, while the rest of the map would be white. For the grass, I used a grass brush that I found on deviantart. To show what the texture looks like I used a House thing.
iadtgame225_Texturing and Lighting 