This is a map I started yesterday, it's sort of a prologue to submerged..Anyway, this is using the textures from NMNPack1. Which I thought had some pretty good textures in it, and...I got inspiration.
Change sky to darker sky! then make street lamps(It can be possible in 3d floors) then include dynamic light on the lamp where it's supposed to light heh just idea
Probably a tad dark for my liking, but looking very great.
And like said above, if you are gonna make the map that dark then use a darker sky at least. The sky's brightness makes it look really out of place with the dark map.