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

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Laurent Belcour
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  • PersonId : 864919
Mégane Bati
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  • PersonId : 176588
  • IdHAL : megane-bati

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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Dates and versions

hal-02883680 , version 1 (29-06-2020)
hal-02883680 , version 2 (17-08-2020)

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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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