This repository contains a Godot test project that implements a blur based lighting post effect based on the approach defined in this tweet from Harry Alisavakis: https://twitter.com/HarryAlisavakis/status/1405807665608015872?s=20
It uses the new Compositor Effects API, available in Godot 4.3.
Note that this project was build as a straight forward implementation of this effect. The blur shaders can definately be optimised a lot, they do not make use of more advanced abilities of compute shaders. The goal was to produce an example to showcase how Compositor Effects can be implemented.
The source in this repository falls under an MIT license (see LICENSE)
The 3D scene used is licensed CC-BY-04 - Klonk games (see assets/sketchfab/shift_happens/license.txt)