The pavement looks great! I'm a big fan of the pattern you've got going on though I think you could push it a bit further. I think it could benefit with a little more contrast. I think the highlights are a little dull, even for stone. But don't go too far, you'll still want characters to be easily seen.
I think the grass might look better if it wasn't so wild looking. Try have the blades face in one direction or straight up. I think most grass grows straight. At least try it out.
The cliff is indeed very WIP. We should both look around for some good examples of cliffs.