Zoning a Complex / Non Box Area?

Game Modding | Call of Duty: Black Ops 3 | Radiant

Runis:

I'm kinda confused on how to zone a complex layout room, because you can't overlap zones correct? Can I have multiple independent volume brushes of start_zone to fit the area properly? Can I merge cut volume brushes into one single brush? What's the method? Tutorials only showcase basic boxes.

Spiki:

Cut the boxes with ctrl shitf x i think

eDeK:

This has nothing on your specific problem but maybe can help you when you solved the problem.
https://forum.modme.co/threads/edicius-s-asset-pack-textures-bo3-zone-color-coding.3640/

sanctummm:

to make an irregular-shaped zone, duplicate the first one, and add a target KVP to the second one,and make the target has the same value as the script_string

here's an example: