Godot 4: LCD monitor shader (tutorial)

Hey everybody! Do you remember the simulation of an old CRT monitor I created about a year ago? We had programmed various issues and imperfections characteristic of these devices, such as white noise, rounded corners, ghosting, and so on. This time, we’ll simulate a more modern device: an LCD with its typical pixel grid and less vibrant colors. Unlike CRT, such a shader is elementary, as we’ll see right away.