It was mentioned new building styles will look different at we go into new Ages. And not, ceiling and foundations aren’t the same. YES, they are both cubes, to give the idea you’re in a damn dungeon, with no escape, this is why the one ceiling piece with the grate, has a long hole in it, to give the idea you’re in a long dark pit of despair. However, the ceiling piece can be told the difference between a foundation, by the black rim at the top and bottom. The foundation doesn’t, only on the top piece. Again, they’re cubes, but aren’t foundations, because the ceiling isn’t stable.