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The communication assistant shadows what the hearing caller is saying , and has the opportunity to correct what appears on-screen before it is sent to the deaf or hard of hearing caller . The flute-like trill of a canyon wren accompanies us into the shadowed fissure . Soft shadows from area light sources can greatly enhance the visual realism of computer-generated images . Armed struggles are completely unacceptable today , " said Nazir Masoodi , a Srinagar-based journalist who is convinced that the Kashmiris are fast realizing the change in mood internationally . We present two efficient image-based approaches for computation and display of high-quality soft shadows from area light sources . In what I have said , I have thrown , perhaps too much , into the background and the shadow the cases where the controversy turns not upon the rule of law , but upon its application to the facts . Here would be found a panorama of beauty that would throw into shadow the fables of wonderful palaces and cities told of in the " Arabian Nights " ; yet the genii of all this would be naught but the intelligence of man working in unison . Shadows from tall buildings located in the Atlanta city center can also be observed . The main question this dissertation addresses is the following : Is it possible to design a computer graphics API such that modeling primitives , computing visibility , and generating shadows from point , linear , and area light sources can be conveniently and concisely expressed ?