Until AC22 arrived, I've built curtain wall segments a=s straight pieces and then connected them by creating "Common Frames".
A closed polygonal curtain wall facade seems much easier in 22. with the new graphic interface for scheme settings, but how does one get the last corner to behave like the other three? To get this I established a pattern with a straight line segment and them magic handed those settings on the Floor plate Zone.
Think Like a Spec Writer
MacBook M4Pro - 24Gb RAM
AC4.55 through 30 / AC29.2.1 COLLABORATE AC30.0.0 COLLABORATE
Rhino 8.36 Mac
MacOS Tahoe 26.6.2