about the door's shadow, i have seen games where the door doesn't cast a shadow, play splinter cell 2, you will notice if you are in a bright room and then you open the door to a dark room, the light stops where the doorway is, it looks kinda weird, but you get so into the game that you don't realise it unless you are paying attention. that is the key, most people don't really pay attention to that stuff if you are into it, heck, Halo doesn't even have shadows for the ppl you are shooting, only the people that are artists and game programmers and designers and the like notice that stuff because that is what we are always trying to pay attention to (details,details,details). The common gamer who plays wont really notice it, or they will and just not care.