I saw a making-of doc on "Air Force One" which showed the actors filming
in front of a green screen (is this still called "rear projection"?).  Why
green instead of blue?  Are both colors used, according to costumes etc?
Is there some technical advantage to green?
Lang Thompson
(with a new section on HK films)
Screen-L is sponsored by the Telecommunication & Film Dept., the 
University of Alabama.