Alright, better pictures and diagrams will come soon. They all probably have some sort of motion blur, I was just taking them freehand. *looks for camera tripod*
Brightness in my early tests is actually fine, plenty of headroom in that respect.
As for the multiplexing vs. charlieplexing, alright. Jut got a little carried away with my terms I guess, thought only charlieplexing used the high-impedance mode, while multiplexing was just binary.