the outside wall-cave things have this displacement like thing,
Ahhh. Thank You.I think OP is looking for the displacement stone walls.
Which is technically the same as the interior cave walls.
See also: Displacement Cliffs
It's always easy to tell who will effectively use advice they given... and who won't.
I think you mean it's incredibly easy to see who just mocks people and who actually tries to help.
I'll leave the thread open so pool can use it for any further displacement related questions if needed, otherwise cease and desist in your rudeness. Or I'll have to throw the posting guidelines thread at you.