I’m not sure how this happened, but my lighting now appears to be corroded (images below). Maybe I accidentally changed a setting with a hotkey? Any ideas? Pulling my hair out trying to figure out what changed. It only looks this way when running the game. In the editor, it looks normal. Also, small detail, but this occurs when I load the actual dungeon as a scene, additively. If I start the game with the dungeon already in the scene, it appears normal.
NVM, figured out the issue. Would delete but can’t delete threads.
What caused it?
In my LoadSceneAsync (additive) code that added the Dungeon, it was essentially adding it twice. The presence of all the objects twice in the exact same spots produces that weird lighting behavior.
By the way, what you meant as “corroded” is Z-fighting 
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@Mauri Awesome, that’s it! The picture on that wiki page is exactly what I was seeing, thanks for the info.
Oh, now it makes sense.
Good to see you solved this.
Drat! Why didn’t I realise it was Z-fighting all along. Lol!