> He did popularize, if not invent the idea of a metalness map. I don’t know what the precise differences are, but FWIW we had an uber shader that we called “u

> He did popularize, if not invent the idea of a metalness map. I don’t know what the precise differences are, but FWIW we had an uber shader that we called “uber shader”, with a metalness map (a texture driven metallic BRDF lobe, not just full color specular) at PDI in the late 1990’s, written by Sing Choong Foo (who worked on the Lafortune model). I’d guess Pixar and other studios had one too by that time.