Alright, thanks for the input. I figured the problem was I exported in png (32 bit) while all Quixel surfaces use jpeg (24 bit). So yes, bit depth was the problem, though I read that png also adds gamma on it's own, further shifting the original gamma. Though I guess there is still a problem with the color space, as the…
No matter what output settings I set for the output nodes, the incorrect gamma stays the same as long I use png as export format. There is no setting for 16 or even 8 bit sRGB, and linear didn't do the trick either. and after looking up what Quixel uses for their materials, I figured that the issue has to do with the…