This is my first attempt at photo-realism, and it was a great learning experience. I intentionally chose something with simple geometry so I could focus upon materials and lighting, and especially various weathering and dirt elements, to try and sell it as real. You can never be completely happy and there are always little things you’d like to refine or improve, but at some point you just have to call it Done and move on to the next project. Your comments, questions, critiques, and any advice you may have are all very welcome. Thanks!
(All done in Blender 2.82, rendered with Cycles)