To view zone spaces in 3D, go to View > Elements in 3D View > Filter and Cut Elements in 3D and make sure the “Zone” checkbox is selected.
In 3D, Zones appear as 3D spaces. ARCHICAD performs accurate analyses of both the geometric and quantitative attributes of zone spaces, no matter how complex their geometric shape.
Note that the Z-value (height) of a zone space is not constrained by its boundaries as defined in the 2D view; your zone space in 3D takes on the height you define in Zone Settings (zone height.)
Note: You may wish to display 3D Zones as solid bodies in shading mode, and all other elements types in wireframe mode. To achieve this effect, apply the predefined “Show 3D Zones as Solid” Layer Combination.