Another concept, this is a trailer depot for Rigs of Rods. Also, the truck shop is in game and working :)
This concept art is represents a pretty big improvement for me and just goes to show how good studies are. Last night I did two. You can see one of them below, it was strictly 20 minutes, hard round brush only, no undo, no layers and no adjustments.
It may not look like much but I learned quite a lot from that little painting :)