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A BSDF for true subsurface scattering. The parameterization is chosen to match random walk Monte Carlo methods as well as approximate empirical methods. Note that this category of subsurface scattering can be defined more rigorously as a BSDF vertically layered over an Anisotropic VDF, and we expect these two descriptions of the scattering-surface distribution function to be unified in future versions of MaterialX.
Although MaterialX supports layering BSDFs and VDFs, Karma does not currently support this combination.
拡散反射率(アルベド)。デフォルトは(0.18, 0.18, 0.18).
Sets the average distance that light might propagate below the surface before scattering back out. This is also known as the mean free path of the material. The radius can be set for each color component separately. Default is (1, 1, 1).
Anisotropy factor, controlling the scattering direction, range -1.0 to 1.0. Negative values give backwards scattering, positive values give forward scattering, and a value of zero gives uniform scattering. デフォルトは0.0です。