Those are brushes I picked up from these boards. Unfortunately no idea how to sharpen them. Also used a top down texture for trees, but that looked even worse. Seen some people make lush woods so trying to figure out how they did it. Also got Cities from PNG files out of CC3, but they don't seem to fit style wise.

Also for desert/ice continent. Any suggestions for those before starting on it?

The Ice continent I'd like to do a bit Norse themed. So barbaric tribes, centaurs, ogres and such. Desert continent obviously more Egyptian/Arabic. But the desert ground texture is awful as well hehe.