Interesting. Because the base color is just… part of any material. Like it’s not sampling from anywhere- which screams “Corrupted.”
I’m going to try to download it from bridge and see what I can figure out a manual solution. What are the specific megascans you’re using? Give me any information you can so I can actually find it in Quixel bridge. “Derelict Corridor” is giving nothing that I can find. 