[dhrogus]

ok so,
u wrote u focus only on lightning and texturing, but important r every 3 parts.
Modeling: nice detailed model with no textures sometimes looks better than with it. Try to model more details. Dont worry about using more seperate objects. For example roof. If u use 20-30 modeled boxes, it would be better. Next thing is, dont use bg picture everywhere. Model ground with some trees.
texturing: Good texturing needs nice detailed model :). More bump, it wont looks so flat.
lightning: I prefere HDRI maps with Vray light. It always looks cool.

Keep going and trying. U r better every day :)