 In "Citizen Kane", Welles used a deep-focus technique, in which heavy lighting is employed to achieve sharp focus for both foreground and background in the frame.Wise later used the technique in films that he directed.Welles' "Citizen Kane" also influenced Wise's innovations in the use of sound in films such as "The Set-Up" (1949), where Wise limited music to in-film sources, and in "Executive Suite" (1954), which used no music.