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Exploiting Sphere Mapping

Sphere mapping is a useful tool for creating realistic computer-generated images. It is currently the only view-dependent texture mapping technique widely supported in hardware. Understanding how sphere mapping relates to other environment mapping techniques such as parabolic mapping and cubic mapping can help promote its use in the appropriate context. After an initial survey of texture mapping and a discussion of the benefits and limitations of various mapping models, sphere mapping and its applications are discussed in depth. The discussion of sphere mapping includes: the simulation of scenes as viewed from a window, lighting models, colorgrams, and reflectance functions.