I’ve got a rectangular column which currently has a small hole. What I am trying to do is make it completely hollow (flat not round inside like a box with no top or bottom), but still have thick strong walls with no holes in the side, or any relief in the center. Sprial vase mode does this, but as you can see, it leaves holes in the exterior walls, and the patters on the outside are concave inside the column. Is there a way to just increase wall thickness or something?
