While it is still a far ahead task for the current stage of my work, I've dedicated some time looking for a suitable lanscape reference to color my image (mostly concerned with coloring of trees and ground, as rooftops is practically a settled issue).

I decided to go down this road:
landscape_reference_guildcity.png

This is Google Maps at the edge of that brazilian city, Feira de Santana. Soil is grayish brown, natural vegetation is composed of quite dark small bush with slightly larger vegetation on the natural seasonal waterlines. This pic also shows a very-bright-green water pool and some trees within the "city circle", and being tended, they are a tad larger and brighter...
So these are my plans. I wonder if I can pull this one off...