This is really nice, everything is loose yet has that sort of grittiness about it, its all shaped by the light. You really know how to work lighting and atmospheric perspective, I'm finding lately I get very tired of having to detail things in too much; and it seems you don't need to do this with your work, I suppose lighting is everything. Anyway its great to study your work. This sort of effortlessness is what striving to achieve. How long would you spend on something like this? including research etc.