backrooms demo godot 4 (includes source)

Here is a quick procedural generation example with source to get you started. I'm not sure if this is the best way to do it but it works well and allows you to pass a seed so I was pretty happy with it. 

The main scene uses no light sources and only uses the SDFGI, which can create better looking scenes but sometimes causes weird inaccuracies or artifacts as you'll quickly see.