Minecraft version

1.20.x

CodeChickenLib version

4.4.0.512

CBMultipart version

3.3.0.146

ProjectRed version

4.19.0-beta+3

What happened?

When I use the colored block (inversed or not), I don't have any colored light, but only a standard light (like a torch) with some strange shaders popping sometime.

Here some screenshots (no more mods are in this instance, only the dependecies and Project Red).

Crash log

https://gist.github.com/guilomet/13cde5088eb655c68d9921aabf99a1f5.js

How do you make it happen again?

Just place some illuminated and colored block anywhere.

Confirmed bug with non-fabulous rendering mode. Will look into it

This is a bug in NeoForge. It was fixed in the 1.20.x branch but has not been picked into 1.20.1. I'll see if I can open a Pull Request for it.

neoforged/NeoForge#231

Arf, I got the bug with Forge to, and indeed Neoforged didn't backport some fixes. But I got this problem in Forge 47.3.1.
Just to know, have you some futur compat with Oculus shaders or not ?

Trying to throw together a mixin to path the bug at runtime.

There's no specific compatibility with Oculus shaders or any thing else. It might work though.