I apologize for did not answer before, you're right. The project was in hold for the client so I did not try to do it again. I'm half way of your suggestion with the empty corner window. Thank you so much for your help.
Storefront and Curtain Wall windows and objects will do this also. You can set the frames anyway you like. So will DWB 35 parts (door&windowbuilder - cadimage). The former will also handle butt-glazed conditions.
Andy Thomson, M.Arch, OAA, MRAIC Director Thomson Architecture, Inc. Instructor/Lecturer, Toronto Metropolitan University Faculty of Engineering & Architectural Science AC26/iMacPro/MPB Silicon M2Pro