Background wip

I started working on a background scene for the gif where I may animate the smoke in the background and sky. I used some silhouette brushes to build up the environment:

brushes credit:
http://www.deviantart.com/art/ruined-94382137 - silhouettes
http://soldatnordsken.deviantart.com/art/My-painting-brushes-Concept-art-speedpainting-415473881 - details