The atmosphere is really really cool, great work!
I think the terrain is good as well, though I can't see much of it. I'm sitting here without lights (I deliberately avoid to call it dark room

) and still I can't see much of the features of the terrain.
However the closest foreground shows good stuff, so I assume the rest looks the same

Could also be my TFT of course...?
Anyhow, nice work!
Martin