the edges to that small yet very tall mound of earth look quite odd. if i were you, id fill up all those spaces on it useing more plants and rocks, perhaps a small trees or two. then add some stairs so the platform is acessable, there are lots of custom doodads that could be used for this, but if you dont want to import any more, the table and hitching post models should do fine.
as has been said before, that fog dosnt fit the atmosphere very well. seeing as this is orc fort, a deep orange might be more preferable, or at most a very yellowy green.
the terrain is nice, but far too often have i seen beach shots spoilt by the appauling sand tile. there used to be a white sand tile (made by draco i think), if its still up for download somewhere, it would add a lot to this terrain, if not, then it shoudlnt be hard to replicate with any photo editing program | 
