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Bringing an Accurate Fresnel to Real-Time Rendering: a Preintegrable Decomposition

Laurent Belcour 1 Mégane Bati 2 Pascal Barla 3
1 Unity Technologies [San Francisco]
2 IOGS - Institut d'Optique Graduate School
3 MANAO - Melting the frontiers between Light, Shape and Matter
LaBRI - Laboratoire Bordelais de Recherche en Informatique, Inria Bordeaux - Sud-Ouest, LP2N - Laboratoire Photonique, Numérique et Nanosciences
Abstract : We introduce a new approximate Fresnel reflectance model that enables the accurate reproduction of ground-truth reflectance in real-time rendering engines. Our method is based on an empirical decomposition of the space of possible Fresnel curves. It is compatible with the preintegration of image-based lighting and area lights used in real-time engines. Our work permits to use a reflectance parametrization [Gulbrandsen 2014] that was previously restricted to offline rendering.
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https://hal.inria.fr/hal-02883680
Contributor : Pascal Barla <>
Submitted on : Monday, August 17, 2020 - 10:16:31 AM
Last modification on : Tuesday, December 8, 2020 - 9:48:58 AM

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Laurent Belcour, Mégane Bati, Pascal Barla. Bringing an Accurate Fresnel to Real-Time Rendering: a Preintegrable Decomposition. SIGGRAPH’20 Courses, Aug 2020, Washington, D.C., United States. ⟨10.1145/3388767.3407325⟩. ⟨hal-02883680v2⟩

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