Glad that was the solution.
Same layer or not will make no difference.
With a polygon wall you have to manually adjust the nodes to get the shape you want.
I would try to avoid using them unless you really have to.
Barry.
One of the forum moderators. Versions 6.5 to 27 i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10 Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11