Spherical environment map


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= Spherical Environment Map = Spherical Environment Mapping is one of the simplest reflection mapping techniques. However if the camera moves around the object, the reflection is not very realistic since the same image is always reflected. The reflection is view-aligned.

ZBrush uses SEMs for its materials, it calls them LitSpheres.


 * The Art of Texturing Using The OpenGL Shading Language - Spherical Environment Mapping - by Jerome Guinot
 * Spherical Environment Mapping in Unreal 3 - by Norman Schaar
 * Toon/Comic Shader for 3ds Max by Till "Rollin" Maginot supports SEM (LitSphere). More info in the Polycount thread TF2 and TOON realtime viewport shader (3ds max).


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