Godot 4: Glass Door shader (fast blur tutorial)

Hi everyone! Do you remember the video about detecting edges using the Sobel operator, which we enhanced by using Gaussian blur? One of the drawbacks of Gaussian blur is that it's somewhat computationally intensive, which can pose some performance issues for our game if we want to apply such an effect in real-time. In this video, I will demonstrate a much faster way to blur our sprite or the entire screen.