Models a hair as a dielectric cylinder with a tilted cuticle, splitting scattering into reflection, transmission and internal reflection lobes. Explains the two offset highlights real hair shows.
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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extendsadds capability to BSDFa fibre scatters around its axis, not a normal
References
Light Scattering from Human Hair Fibers — Marschner, Jensen, Cammarano, Worley, Hanrahan — 2003 · link