d'Eon, EugeneBousseau, Adrien and McGuire, Morgan2021-07-122021-07-1220211467-8659https://doi.org/10.1111/cgf.14348https://diglib.eg.org:443/handle/10.1111/cgf14348We present a new analytic BRDF for porous materials comprised of spherical Lambertian scatterers. The BRDF has a single parameter: the albedo of the Lambertian particles. The resulting appearance exhibits strong back scattering and saturation effects that height-field-based models such as Oren-Nayar cannot reproduce.Computing methodologiesReflectance modeling10.1111/cgf.14348153-161