Not sure. I think maybe some canyons, valleys and whatnot. If those can be done.
And how do you plan to distinguish the forests from normal plains? Just two different shades of green, or will you actually indicate forests by a tree symbol or something? And what about jungles? Will we have them? And if so, will they need to be distinguished from forests?
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)