1. I'm not sure I fully understand the question but I'll write some stuff anyway :) . Companies like Pixar and Dreamworks will paint textures to achieve a cartoony look. It used to be much more common to use procedural shaders that are evaluated at render time rather than textures. These saved on memory and disk storage,…
Outside of Disney PTEX is most commonly used for environments. When dealing with complex, especially, scanned geometries it's a god-send not to have to UV them. They're sometimes a mess. Minimising texture sizes is no-where near as important as it is in games. Disks are cheap, memory is cheap, network is cheap. People are…