Subtract Columns from Room

[Revit_Noob]

I asked for helped regarding filling the room with filled region to show it as Floor Finish of the room which is working fine here :

Filled Region from Room Parameter

There is a Floor Finish System Parameter in the room, my question : Is it possible to automatically create Filled Regions in a Room based on that Floor Finish Parameter? Example : Room1 | Floor Finish : RED-Solid Pattern Room2 | Floor Finish : Blue-Solid Pattern Room3 | Floor Finish : Green-Solid Pattern

My question is how do i subtract unwanted columns from being filled with filled region. And how to tweak it so it will work for linked model.

[Nick_Boyts]

Last I heard, filled regions (and anything else that uses the sketch editor) cannot contain interior loops when being created from the API. I’d be happy to hear that this has been fixed though.

[Sorin_T]

Try to use polycurves for exterior and interior loops as input for the boundary, both in the same list, i was able to create floors with openings in them that way in the past, maybe it works with regions as well.
Let us know if it works.