Concept art making of/guide (architecture, buildings, props)

This is a quick making of/guide of architecture, buildings and props concept art.

Done for an unannounced project, I am presenting only a few pieces as there have been a lot of work. Roughly it shows the process I am using most of the time for this category of work, obviously not 'paintings' per se but a long process of 3D prototyping, very rough, sometimes fast and sometimes slower to build and with a very structured workflow.

Work is done essentially on Blender, I use from time to time some addons such as: Hard Ops, Box Cutter, Physical Atmospheres, Kit Ops, Sketch Style. Then of course Photoshop for quick iterations, quick over painting and step by step final clean work prepared for outsourcing.

Refs used for inspiration can be found on google image.