How to open a hole in the original top surface of the apartment type

Hello, the original ceiling of the apartment cannot be directly deleted, but you can create an opening by placing a skylight. The operation steps are shown in the screenshot as follows:

1. You can add a skylight. Search for "skylight" and place the skylight directly on the ceiling of the apartment to achieve the opening effect;

If the ceiling of a space requires both an opening and a ceiling design, because the new version of the ceiling and walls cannot be directly opened, you first need to create the ceiling shape in free modeling. Then, double-click on the surface of the free model in the custom ceiling and walls to create the ceiling. The operation animation is as follows: