As the title says walls and floors textures aren't loading for whatever reason. I don't know what caused it, it just happened after I was farming the 3rd episode boss for the boss's armor set.
I have tried starting a new episode and killing myself to get sent back, existing the hub and going back to it via the doors, quiting the game and closing the application but nothing worked. Note that everything else seem to function normally the objects and machines are OK. You can see all of this in a 5 minutes video.
I have a longer version of this that goes 15 minutes before the boss battle but there wasn't anything interesting to show off so I cut it off but it's there if it's needed.
I don't know if this is helpful but the game is saved in a 4TB external hard drive attached to a slim model PS4.