I'm the editor of the Chip Hall of Fame: if you follow the link in the citation where Pixar/Toy Story is mentioned, it takes you to a whole Spectrum feature about the development of Renderman :) But this article was intended to be tightly focused on the creation of the NV20, and how it enabled real time shaders, so I didn't have room to do more than mention Pixar in passing!
Before GeForce 3 was a thing, those of us with access to NeXT machines already had a blick what would mean to write shaders.
https://en.wikipedia.org/wiki/Pixar_RenderMan
https://en.wikipedia.org/wiki/RenderMan_Shading_Language
"The RenderMan companion : a programmer's guide to realistic computer graphics.", 1990
I am also missing 3DFx's work on shading languages before they got acquired by NVidia.