Have you tried the 'Archicad YouTube channel' in the HELP menu of Archicad.
This will give you the official Graphisoft movies.
Type "shell" in the search and will show you all movies to do with shells.
I think these movies were made in version 15 when the shell tool was first available - but the tool has remained the same since.
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