Precomputes the directional albedo a single-scattering microfacet BRDF loses and adds a fitted lobe back to make up the difference. Far cheaper than a random walk and close enough for production.
supersedescorrects · extends
classifiesspecializes · part-of
substitutes forapproximates · alternative-to
depends onrequires · validates
Colour is the family; a dashed line is the second member of it.
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