Method 1: Use columns instead of walls. If it needs to be suspended, modify the height above ground of the columns. The operations are as follows:

1. In the house type - structural components - drag and drop the columns with the mouse and place them in the room;

2. Stretch the column and change the size. If doors and windows are to be added to the column, note that: The value of the length represents the thickness of the wall, and the value should not be too large. It is recommended to be 120 or 240;

Method 2: Select a single section of the wall in 2D, select half-wall in the right editing bar, and then modify the wall height.