+A **surface normal** is a [vector](/wiki/vector) that is perpendicular to a [surface](/wiki/surface) at a particular point. It essentially points outward, defining the orientation or 'facing' direction of that small patch of the surface, crucial for calculations like lighting and shading in graphics.
+## See also
+- [Vector](/wiki/vector)
+- [Geometry](/wiki/geometry)
+- [3D Modeling](/wiki/3d_modeling)
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