I'll preface this by saying I know next to nothing about computer/gaming technicalities nor what could cause this. I'm playing through CrossOver 20.0.2 on a M1 Macbook Air, if that helps any.
The intro and first mission of the game are fine, disregarding the floor textures completely disappearing from the intro cutscenes and the safe room in Dunwall Tower. But as soon as I wake up on the Dreadful Wale after meeting the Outsider, not just the floors but the entire ship disappears.
I make my way to the skiff by following Megan up some invisible stairs and hope Karnaca fares better... which it doesn't. At this point the game's pretty much unplayable.
Messing around with the game settings, verifying game integrity, reloading/restarting, deleting/reinstalling, etc doesn't do anything. Trying to embed images didn't work so here's a link to an Imgur album with screenshots.