All the discussions about instant film sent me to find this one. 4x5 Polaroid, from the early to mid 1990's. It was the side of a garage, with a hanging basket. The wall had taken on a vert-de-gris effect, with greens mingling with grays. The Polaroid is still in good shape.
Thanks, everyone. This was tacked to a bulletin board for about 20 years, underneath a lot of other stuff. I'm surprised I still had it, as Polaroids were always something I used to determine film exposure, then tossed. For some reason, I never shot this on film, and it ended up coming home with me. I'm gonna cut a mat and find a little frame for it...