So I might sound stupid but listen BATIM takes place in the back rooms first it's seems endless and it's back rooms yellow it's full of entities I just think that
Elements in the game wouldn't make sense, like the ink creatures being created by ink, while the entity in found footage being a bacterial cluster (yes, a creature that large is made of bacteria, hence the name), and the walls in BATIM being made of wood, but other elements would make a little sense.