This looks spectacular. Nice job.
I especially like the shape of the southwestern mountains, and the rivers. I'm a sucker for shapes, I probably care more about them than texture.

The only (minor) note I have is the shape of the part of the "Harrowing Barrens" mountains that face the sea. They have a strange shadow-like edge. This is probably because of the bevel/emboss effect on them. It's not that big a deal, it just seems slight out of style to me.