New paper derives elementary BRDF expression for multiple scattering in microflake media
ssh4net · x · 2026-09-19
Jonathan Dupuy's new paper, An Elementary Expression for Multiple Scattering in Homogeneous Microflake Media, introduces a novel diffuse-like BRDF based on microfacet theory.
- Key result: under the Smith shadowing assumption, both evaluation and importance sampling admit elementary expressions while accounting exactly for all scattering orders — the first construction shown to be possible.
- Behavior: Lambertian reflectance at normal incidence, with reflected light progressively concentrating around the mirror direction as incidence approaches grazing.
- Includes rendering comparisons against Lambertian and state-of-the-art stochastic microfacet BRDFs.
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