This one gave me the most trouble so far despite its simplicity. I learned a lot while painting it though. The dark plains of the house pick up many colors from its surroundings. when i began painting it, i tried various shades of gray and it wasn't working out, then i tried pushing some of that sky blue and green from the near by tree and it began to come together.
About 1 hr in photoshop
about 30 min in photoshop