An invisible wall or invisi-wall is a video game term for a boundary that limits where a player can go in a certain area, but doesn't appear in-game as any kind of visible obstacle, or as an obstacle that in reality could easily be bypassed, such as a mid-sized rock or short fence. In 2D games, the edge of the screen itself can form an "invisible wall", in that a character in play may be prevented from travelling off the edge of the screen. In 3D games, invisible walls are used similarly to prevent a player leaving the gameplay area. This is often done in preference to using a more visible boundary, as this can reduce the realism of the environment.
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Famous quotes containing the words invisible and/or wall:
“Martin Luther King, Jr., was the conscience of his generation.... He and I grew up in the same South, he the son of a clergyman, I the son of a farmer. We both knew from opposite sides, the invisible wall of racial segregation.”
—Jimmy Carter (James Earl Carter, Jr.)
“I make myself this time
Of wood or granite or lime
A wall too hard for crime
Either to breach or climb....”
—Robert Frost (1874–1963)