This script is greatly inspired by Komojo's work from the following thread : https://blenderartists.org/t/playstation-1-jittery-texture-effect-not-for-a-game/1167818 ...
From Si Silicon: Alrighty! So I've given my 90s CGI setup an upgrade. The Non Principled BSDF node now should look and behave closer to Blender Internal (2.79) materials. The world environment setup ...