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ABSTRACT
A wavelength based bidirectional reflectance function is developed for use in realistic image synthesis. A geodesic sphere is employed to represent the BRDF, and a novel data structure is used to store this description and to recall it for rendering purposes. A virtual goniospectrophotometer is implemented by using a Monte Carlo ray tracer to cast rays into a surface. An optics model that incorporates phase is used in the ray tracer to simulate interference effects. An adaptive subdivision technique is applied to elaborate the data structure from rays scattered into the hemisphere above the surface. The wavelength based BRDF and virtual goniospectrophotometer are utilized to analyze and make pictures of thin films, idealized pigmented materials, and pearlescent paints.
REFERENCES
Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.
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CITED BY 22
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Donald P. Greenberg , Kenneth E. Torrance , Peter Shirley , James Arvo , Eric Lafortune , James A. Ferwerda , Bruce Walter , Ben Trumbore , Sumanta Pattanaik , Sing-Choong Foo, A framework for realistic image synthesis, Proceedings of the 24th annual conference on Computer graphics and interactive techniques, p.477-494, August 1997
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