Do you guys have any working code on how to apply filled region in selected Rooms?
Room.Boundaries node from either clockwork or archilab.
Take the curves and create a filled region in the selected view by the elements.
Note: It will not work if you have a hole in the room, but you can do some slicing, removing, connecting and recreating to make two C shaped elements and override the linework in the view to be invisible lines.
Check following discussion.