Skin dual Lobe and diffuse power
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Improved high fidelity skin rendering adding dual lobe and diffuse power on Diffusion Profiles for materials using Subsurface Scattering.
When simulating skin, it is common to use two specular lobes to account for the thin oily layer covering the epidermis. The diffuse power is used as a way to simulate diffuse lighting on non lambertian surfaces, such as those that exhibit strong subsurface scattering.