Just noticed this last night at home - a downstairs light shone through the handrail supports to give a converging shadow. Of course the stairs themselves converge as well...
Nice to see someone got the shadows to work. My original thought for my chess shot was to try to get the white/black piece shadows converging in the middle of the board. I never could get dueling flashguns to produce the effect I wanted.
Nicely done and the BW works well.
Bob