The linked video is an in depth and step-by-step explanation of Disney's "Principled"[0] BRDF shading model.<p>The latter part includes a really great explanation and visual demonstration of each of the controllable parameters--which is very also helpful for artists who use BRDF in 3D packages such as Blender.<p>(Includes math/maths content but presents it in a more accessible manner than one might anticipate.)<p>Fair warning: Acerola's stylistic choices may be... an acquired taste but the content of the videos is <i>absolutely</i> worth acquiring the taste for. :)<p>[0] Including why it's called "Principled"--which I hadn't realised I <i>did</i> actually want to know. :)