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Normal mapping
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<p>In <a href="/facts/3D_computer_graphics/zlWW6eaF">3D computer graphics</a>, normal mapping, or Dot3 bump mapping, is a <a href="/facts/Texture_mapping/9gDTsuXN">texture mapping</a> technique used for faking the lighting of bumps and dents – an implementation of <a href="/facts/Bump_mapping/c97rLmK6">bump mapping</a>. It is used to add details without using more <a href="/facts/Polygonal_modeling/lhEsjXWc">polygons</a>. A common use of this technique is to greatly enhance the appearance and details of a <a href="/facts/Low_poly/a2oI9FHR">low polygon model</a> by generating a normal map from a high polygon model or <a href="/facts/Heightmap/EwXCqTY7">height map</a>. </p><p>Normal maps are commonly stored as regular <a href="/facts/RGB/3Be0zwCj">RGB</a> images where the RGB components correspond to the X, Y, and Z coordinates, respectively, of the <a href="/facts/Surface_normal/jhtLIhcu">surface normal</a>. </p>