Choose the desired RGB color and the shader will approximate the necessary absorption coefficient (below).

This mode defines the color as the quantity and ratio of the pigments which are commonly found in hair and fur, eumelanin (prevalent in brown-black hair) and pheomelanin (red hair). The quantity is specified in the Melanin input, and the ratio between them in Melanin Redness. Increasing concentrations darken the hair (the following are with Melanin Redness \(1\)):

White (Melanin \(0\))

Blonde (Melanin \(0.25\))

Reddish (Melanin \(0.5\))

Brown (Melanin \(0.75\))

Black (Melanin \(1\))

Additionally, the Tint inputs allows to dye the hair with the desired color.

Specifies the attenuation coefficient \(\sigma_{a}\), as applied by the Beer-Lambert law. This mode is intended mainly for technical users who want to use coefficients from the literature without any sort of conversion.