It's looking really nice. I have been thinking about creating paramonia in 3D, but i was worried about creating trees rocks etc. Your rocks and trees looks just average. Good rocks should have good diffuse and normalmap texture (what means you should create good highpoly model in Zbrush or Mudbox. Of course if game engine supports normal maps).
Also i must mention that fog is too dense, but i guess that present appearance is temporary and be fixed when background elements will be placed.
I'm interested how paramonia will look when finished
Good luck