Detail 1 - Plane and tarmac. The most ambiguously difficult part was adding detail to the tarmac, without having the tarmac become too noisy. It needed to have visual substance, but not take away from the main focus of the image... the plane.
I'm very happy with how the engine semi-metallic body turned out. It could always use more, subtle detail but at some point I needed to move on and I think I've found a good balance with this image.