Looks pretty good to me. Only the grass looks a little out of place there. I once got the tip from Iglarion to fade the grass out on the bottom of the sprite/ model, i.e. use an alpha gradient where your grass currently gets darker (don't know if that will work for you as you don't seem to use alpha transparency right now?). Additionally, the ground texture needs to look similar to the grass models(' textures) or vice versa. What you could optionally do is to change the blend map of the terrain (if any) or use vertex colors/ vertex information to blend and change the terrain texture slightly wherever grass is (or buildings and so on).