Hello, when making the villa duplex floor, columns can be used to add doors and windows. When modifying the column parameters, the following two points should be noted: (Beams and floor platforms are not supported)

1. The value of the length (L value) represents the thickness of the wall. The value cannot be too large and must be 240 or 120. Do not check the aspect ratio scaling;

2. The height from the ground of the column must be 0. If the column is to be placed on the second floor, first change the height from the ground to 0, and then modify it after placing the doors and windows.