I have Embeddium, Chlorine, and Oculus on Forge 1.20.1. Running the game with or without shaders enabled, if I’m in first person and look at anything with the radiation glow effect (anything with radiation, or Tremorzilla while charging/using beam attack), my entire screen goes black except for the glow.

It also happens whilst the notor is scanning, it is well, good to see that I am not the only one having this issue.

Btw this doesn’t seem to happen when in spectator mode.

Seems to just be an issue with Oculus. I'd recommend uninstalling Oculus and trying Mekalus. If you're still having issues, you might as well just play without shaders.