I don't know what settings you're using and what you want to achieve.
Maybe a bit of my explaning will help you.
The standard 'Floor Plan Cut Plane Settings' are these:
This means your floor plan will be shown over it's whole height.
If you change it into this you get a real cut plane:
The 'Show up to' and 'Show down to' settings is the range of what is shown on your floor plan.
Architectural construction designer, draftsman, modeller
ArchiCAD 25.