Excellent work around, thanks.
But it's still just a work around. It would be nice if AC would let me subtract, say, a new foundation from an existing hillside -- and leave the mesh hillside without holes in the existing views -- without having to have a separate layer group set up for each new and existing plan, elevation, etc.
GS-- is this as simple a fix as it sounds?
AC fan since v 7. Currently on AC 26 Build 5003 USA FULL Apple Silicon,. 2022 Mac Studio, 32G ram. OS X 12.6.2