Anisotropic filtering

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In 3D computer graphics, anisotropic filtering (AF) is a technique that improves the appearance of textures, especially on surfaces viewed at sharp angles. It helps make textures look sharper and more detailed by reducing blur and aliasing that can occur when surfaces are angled away from the viewer. Anisotropic filtering works by applying different amounts of filtering in different directions, unlike simpler methods like bilinear and trilinear filtering which filter equally in all directions. While it requires more processing power than these simpler methods, anisotropic filtering became a standard feature in most graphics cards in the late 1990s and is now commonly used in games and other 3D applications, often with user-adjustable settings.

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