A stencil subtractor, commonly referred to in graphics programming and computational geometry, is a technique used in rendering to control how different layers or elements are drawn on a screen, particularly in relation to the stencil buffer—a type of buffer used in 3D graphics. ### Stencil Buffer Overview The stencil buffer is an additional buffer in graphics applications that holds data about the pixel's state or visibility. It allows developers to restrict drawing operations to certain areas of the screen based on previously defined values.
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