Add false ceiling as a child of the true ceiling

Add a true ceiling to the room first, then draw the false ceiling with the extrude rectangle tool and set its drop height and slab thickness.

1. To create a false ceiling, first add a true ceiling to the room (pick inner-to-inner or outer-to-outer and apply).

   ✓ Checked in the product on 11 October 2026

2. The false ceiling is a child of the true ceiling, so it can only be added after the true ceiling exists.

   ✓ Checked in the product on 11 October 2026

3. Use the extrude rectangle tool to draw the false ceiling end-to-end, then apply and set the drop height.

   ✓ Checked in the product on 11 October 2026

4. Slab thickness can be set in properties.

   ✓ Checked in the product on 11 October 2026