Actually I found the detail without boundary to be cleaner than having the boundary.
For curiosity, I still want to hear from the community if there is an angled boundary.
Lilian Seow
LEED AP | cSBA | CAPM | PMP
Interior-Architecture and BIM Management
AC20 USA | 27- macOS 10.14.6| 4 GHz Intel Core i7| 32 GB RAM | Archicad-user since 1994!