Jadrien, MvHighway: thanks guys.
MvHighway: here is small making of Technicall cover with quick explanation:
1- photos of sky taken from window of my apartment :)
2 - City CG parts modelled in 3ds MAX, rendered as separate passes in V-ray, then composited together and painted in PS.
3 - fitting mood and lighting of sky
4 - base building plate and CGI street ground
5 - finishing backgraound building part
6 - additional CGi elements and first color correction
7 - main CG part
8 - adding light effects, neons, lens flares etc.
9 - final color tweaks.
10 - finished cover