Reflectance models with fast importance sampling

Neumann, L; Neumann, A; Szirmay-Kalos, L [Szirmay-Kalos, László (Számítógépes graf...), author] Department of Control Engineering and Informati... (BUTE / FEEI)

English Scientific Article (Journal Article)
Published: COMPUTER GRAPHICS FORUM 0167-7055 1467-8659 18 (4) pp. 249-265 1999
  • SJR Scopus - Computer Graphics and Computer-Aided Design: Q3
    We introduce a physically plausible mathematical model for a large class of BRDFs. The new model is as simple as the well-known Phong model, but eliminates its disadvantages. It gives a good visual approximation for many practical materials: coated metals, plastics, ceramics, retro-reflective paints, anisotropic and retro-reflective materials, etc. Because of its illustrative properties it can be used easily in most commercial software and because of its low computational cost it is practical for virtual reality. The model is based on a special basic BRDF definition, which meets the requirements of reciprocity and of energy conservation. Then a class of BRDFs is constructed from this basic BRDF with different ent weight functions, The definition of such weight functions requires the user to specify the profile of the highlights,from which the weight function is obtained by derivation. It is also demonstrated how importance sampling can be used with the new BRDFs.
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    2021-09-24 20:47