It’s #VisualPuzzle day (well, evening). Last week’s was solved in one guess, so I tried to make this one extra hard. Then I decided to post two photos to make it feasible, but I suspect it will just be confusing.

A flat, grey surface is textured with concentric rings and pock marks.

A dark, round spot in the center is in focus, and the surface recedes out of focus in all directions.