Wow. The same Gary Kildall who was first approached by IBM for a PC operating system[a] helped write Pixar's first 3-D renderer.
At a minimum, Kildall's Wikipedia page should be updated with his contribution to Pixar!
---
[a] Bill Gates was IBM's second choice, because at the time Microsoft didn't have a PC OS: https://en.wikipedia.org/wiki/Gary_Kildall#IBM_dealings