The new Principled BSDF model in Cycles

In this talk, I'll be going into the theory of physically based shading, introducing concepts such as microfacet models, dielectric vs. conductive materials, Fresnel terms etc.

Based on this, I'll then present the model behind Cycles' new Principled BSDF - the design goals, the components it consists of, the theory that each of them is based on, and how they all combine and interact with each other, as well as some of the limitations and future improvements to be made.

Lukas Stockner
Software Engineer