My guidelines for the buildings are visible, especially towards the bottom center. I kept the background simple, not spending much time on it or worrying about perfection, since I wanted the focus on Spider-man. I also kept it shaded blue to make the red of his costume pop. I did some pointillism on the blue spandex portion and also in the eye lens of his mask, for a bit more realism. I especially enjoyed working on the soles of his boots. It was oddly satisfying. I've included the references I used in the photos here, and you can see slight differences between the pose and the piece. I deliberately made the foot coming forward bigger for emphasis and twisted his torso slightly to put the phone more to the side rather than directly in front of him. I kind of imagine that he had rolled up his mask to take a selfie when it slipped off completely, and you can see that I used the mask in the reference directly. If you purchase this piece, I can send the references as well if you'd like.