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.