Tree City by danielwachter

First off, I really liked the use of lanterns and fire light in this picture. The blue twilight background set it off rather nicely. The number of lights lit in the trees decried that a number of creatures resides in each tree; neat idea. The light reflected in the limbs of the trees is eerie too. I remember reading in my student days a science fiction novel by a famous writer about a city in the trees, but I don't recall this type of detail. This may be totally original, or at least your adaptation is. Remarkable work. I have no recommendations at present.

I really like this image - a lot! Not just because of the beautiful colours you chose, but the composition works well, too I think.

The things that strike me as "not quite there yet" are the perspective of the lanterns hanging from the trees and the fact that all windows seem to be completely evenly lit.

For some more effect (and maybe realism), it would be nice to see the lanterns change size a bit more dramatically the further away they are. Also it would be nice to see them strung up between the trees further away as well.

Also, in generall, the further away something is, the more "hazy" it should be - and not just in the two layers background vs foreground, but for example the left tree that is still in the foreground should already be a bit hazier than the tree in the front. By haze, I don't mean blur (though you can add that as an additional element), but things having less contrast.

Finally, the lighting of the windows is a little bit too uniformly done to feel realistic (of course this advice also depends on how realistic you want to be to begin with). If you were to dim some of them a little, I think that would already help.