Enumeration: CurtainVerticalMode

• AdjustToIntersections = "AdjustToIntersection"

The Curtain will start at the defined zmin and zmax range, but will expand if necessary when intersecting objects are added.
The Curtain size will recede if the intersected object are removed, but will still occupy the zmin and zmax range at minima.

• FitToIntersections = "FitToIntersections"

The Curtain vertical range fill fit strictly to contain the intersected objects boundaries, ignoring the defined zmin/zmax.
When no intersecting objects are defined, the Curtain will occpy the defined zmin/zman range.
When removing intersecting objects, the vertical range of the curtain will recede to the remaining objects boundaries until no objects remains.
If no objects remains, the curtain will default back to the defined zmin/zmax.

• Fixed = "Fixed"

The Curtain vertical size and position will strictly match the defined zmin and zmax values defined by the user.
The Curtain will NOT update based on intersected objects.