R

rack focusing, selective focusing: on-screen focus change from object in foreground to object in background or vice versa.
reaction shot: a cut to a shot of a character reacting to the contents of the previous shot; see also cutaway
realism: a realistic representation of characters and events over sequential time all to achieve the willing suspension of disbelief by the audience; see also Hollywood Realism, Cf. idealism and naturalism
rear projection: a technique used in film making in which a scene is filmed in front of a screen onto which the background action is projected. Originally used for moving vehicle scenes in which the actors sit in a stationary vehicle which appears to be moving because of the projected action on the screen behind them.
room tone: the natural background noise of an enclosed environment; in film-making the room tone is recorded so that the film editor can cover all pauses in conversation with matching background noise; see also buzz track.
Rough Cut: the preliminary edited version of the workprint. See also fine cut.