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Environment-mapped bump mapping (EMBM) is an advanced bump mapping technique that is applied using a combination of different maps. It requires a texture map, bump map and an environment map. A bump is simulated by changing the lighting in areas of the surface on which the bump is located. The bump map contains a value for texel coordinates found on the texture map. The bump map and environment map are combined and the resulting shifted environment map is applied to the original texture.
Environment-mapped bump mapping is a technique that will allow for a higher level of detail to be added than what is possible with texture-mapped polygons by themselves. EMBM makes environment mapping possible in multiple and even all directions.
EMBM has some advantages over regular bump mapping: