interresting topic and the discussion thought provoking, deeper thought reveals hidden considerations , such as the way our brain handles visual input,  almost like it reassembles what is presented to it and makes use of whats most logical and disreguards the rest... i put 2 soda cans on my window ledge and looking between them at a fixed point shows the stereo view, closing either eye without moving still focusing on the same point reveals details that i dont notice when both eyes are open unless i conciously bring them into focus ... seems theres more involved than just the mechanics of stereo photography, perhaps the brain has to accept what is presented as 'real enough' in order to 'see' dimentionally... i know i have seen a few 3D movies where i had to almost force myself to accept what was presented as 3dimentional . some techniques are better than others but, i think all have to be conciously accepted  in order to be enjoyed fully...

:O)

Y'all have a great day.