Does the green screen process have its origins with three-strip cinematography? I would have thought that by printing the Y and C but not the M onto the interpos onto which the matte is being applied would give a perfectly neutral background. __________________________________ Leo Enticknap Postgraduate Common Room School of English and American Studies University of Exeter Queen's Building, The Queen's Drive Exeter Devon EX4 4QJ United Kingdom email: [log in to unmask] ---- Online resources for film/TV studies may be found at ScreenSite http://www.sa.ua.edu/screensite