@Flying_Pig7 Those styling edges are intended for corners/certain edges of wall sections. I have sometimes gotten those corner areas on a wall covering to appear by either creating a wall or completed room inside that meets with that area/corner (depending on the type of corner it is) or pulling our or drawing out a section of the wall to create the type of corner that will create the edge I want. Just experiment around a bunch - hopefully you'll be able to get the effect you want, even if it requires some layout changes to get it to kick in.
