Second for Inigo Quilez. Wonderful presentation for procedurally generated at. He’s also ex-Pixar and creator of https://shadertoy.com (which is also a great resource) and https://graphtoy.com
Inigo is amazing. He explains difficult things really well. I really appreciate his live coding videos where he recreates some of his famous shadertoys.
Inigo and Martijn (the art of code) are really good teachers. I've learned a lot about shader programming by watching their videos
