Fourth wall

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The fourth wall is a common convention in narrative drama in which a metaphorical, invisible, or imaginary wall separates performers (actors, dancers, singers, etc.) from the audience, so that the audience sees through this "wall" into the performed narrative, but the performers behave as if they cannot see the audience in turn. The metaphor has also been extended outside of the theater, for instance to the typical boundary between character and audience in films, video games, or television programs, in which characters behave as if they are unaware of the camera. From the 16th century onward, the rise of illusionism in staging practices—culminating in the realism and naturalism of the theatre of the 19th century—led to the development of the fourth wall concept. The metaphor of a wall relates to the arrangement of elements on stage, where scenes are often set in a room with three of its walls depicted (or visually implied), forming what is known as a box set, with its "fourth" wall non...

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