 The dream scenes were initially meant to form just one long sequence  in the middle of the film, but technical difficulties made this  impossible. The most important part of the dream sequence was  intended to be a scene where Sam flies over a field of eyes, which  then start slowly moving to follow his descent on a pillar. The eyes  were made of snooker balls with false irises added; the eye symbol  is also seen in other Terry Gilliam films including 12 Monkeys. The  decision was later made to split the remaining dream scenes to fill  the "empty" spaces between chapters.