Those are handmade, and it's honestly the issue. If the bases were procedural out of descrete hand made chunks, it'd be less repetitive. There seems to be about five bases for the procedurally placed content, and once you've done it once it gets dull. It's not even like they made furnature procedural or anything like that to change up the looks. They could have at least made different doors locked procedurally so you have to take different routes each time.