I recommend fixing the cliff/ground's bland nature by going through and making a more detailed UV skinning of it. Like, paint all sorts of crevices that will be unique to that certain area, and then dual detail the cliffs. That sort of thing takes some more time and patience, but it has some nice effects when done right. Go look at H2CE's Zanzibar's cliffs to see what I mean.

I did that in Immure 2. I thought it looked cool.