It would be good that the wall join at a corner show up in elevation the same way it does in plan. Revit tends to make the elevation look the way it wants it to look, not the way it is represented in plan. For example: one side of the corner has a brick wall and the other side has a 8" cmu wall. The wall join is a but join with the end of the cmu wall ending at the outside face of brick, therefore in elevation you should see the cmu (7 5/8" wide) end of wall. Revit shows it all brick.