Very interesting how the lines created by light and shadow coaless at one point. Too bad the point was not centered, but that is o.k. given the perspective angle it had to be shot at to get the lined affect. Putting myself in your place as the photographer I would presume that this affect was not immediately apparent; and you had to study the scene for sometime before realizing the correct perspective point to see this. Literally like trying to find the correct shot angle in the dark. Glad you made the effort. Well seen.