It’s not entirely clear from the filming of the hell sequences whether there are gaps between, e.g. the curtains in Limbo and the rotating section of wall in Lust. My sense is that the intended interpretation is that doorways in hell are more like interdimensional portals, and how they look on one side has nothing to do with how they look on the other, in which case maybe the hole behind the claw game in Gluttony and the door with the exit sign in the Doll House are just different sides of the same portal and the difference in appearance is aesthetic.

But I am choosing to ignore that interpretation because the angst potential of Edwin finding a sign in the Doll House that claims to be an exit and diving through the door only to find a blank wall that he has to carve his way through with his own bones in order to get out is just top tier.