I believe I have the same issue. I want to have a lowered ceiling for my bay window (without lowering the roof over the bay window) and a raised floor for my bay window (like a seat that my two year old plays in and where we put our Christmas tree), without raising the outside wall around the bay window. The bay window settings cause the roof to lower or the outside wall to mimic the raised floor. I tried to create a divided room, where I could create a raised floor and a lowered ceiling, but when I try to create the line at the boundaries of the bay window, it makes the whole bay window disappear. Thoughts?
Mardy
Home Designer Professional 2022