Directional-hemispherical reflectance
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Directional-hemispherical_reflectance".

Directional-hemispherical reflectance is the reflectance of a surface under direct illumination (with no diffuse component). Directional-hemispherical reflectance is the integral of the BRDF over all viewing directions. It is sometimes called "black-sky albedo". See also: Bi-hemispherical reflectance

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