I'm using X11 premier on a mac -- I have an exterior garage wall (with a centered garage door) and a gable end -- I'd like to split the attic wall of the gable end into 3 parts -- the central region above the garage door, and the left and right, to have a different material above the garage door.
I have Default Settings > Roof > Auto Rebuild Roof set to Off
I have Default Settings > Framing > Automatically Build Floor and Ceiling Framing Off on all framing types.
I have Default Settings > Walls > General Walls > Auto Rebuild Attic Walls set to Off
If I delete the roof and ceiling planes with Build > Roof > Delete [X] and then use the Build > Roof > Build Roof ... dialog to rebuild the roof and attic from scratch -- I leave the Auto Rebuild Roofs set to Off, to be clear -- and then edit the resulting gable roof on the attic layer, I can split it twice to produce the three separate wall sections, but once I change the exterior material on any of the sections, the three wall segments get replaced with a single wall again. The new wall has my selected material, but that does me no good as I need the distinct secgments.
Anyone know what setting do I need to turn off to maintain the manually edited gable end? Or is this a mac bug?
Or, barring that, does anyone know what approach will let me give the desired finish detail (attached a pic of a freehand elevation)?