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Hidden-surface removal is a technique used in computer graphics to determine which surfaces or parts of surfaces are visible to the viewer and should be rendered.
Back face elimination involves determining whether a polygon is facing away from the viewer and thus should not be visible.
The Z-buffer, also known as depth buffer, is a method used to determine the depth of each pixel in a scene and ensure that only the closest objects are rendered, thus helping to create a more realistic image.
These techniques collectively help improve the efficiency and realism of rendered images in computer graphics.
