a GPU does not render an entire virtual world, nor even much of it, at any given point. Instead, it renders just what’s necessary for a given user when that user needs it. When a player turns around in a game like The Legend of Zelda: Breath of the Wild, the Nintendo Switch’s Nvidia GPU effectively unloads everything that was previously rendered in order to support the player’s new field of view. This process is called “viewing-frustrum culling.” Other techniques include “occlusion,” in which objects that are in a player’s field of view are not loaded/rendered if they are obstructed by another
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