Harvesting Random Elements

There are two kinds of filmmaking: Hitchcock’s (the film is complete in the director’s mind) and Coppola’s (which thrives on process). For Hitchcock, any variation from the complete internal idea is seen as a defect. The perfection already exists. Coppola’s approach is to harvest the random elements that the process throws up, things that were not in his mind when he began. ~  Walter Murch