Here is my second shadow shape sketch from that productive interlude in Airfield.
Rather pleased with how it worked out, despite the face that the side of the barn is a bit darker than I had intended and that I added a shadow that wasn't there when I started to paint (bottom left). That's what happens when you paint outdoors: the sun moves (or rather the earth moves around the sun) and shadows come and go. But, hey, it's convincing all the same, and I would never have dared tackled such complex shapes a few months ago. It's good to see progress!
PS: Sky is real Cobalt Blue, PB28!