When you do the modeling with Interior Modeling, you could import shapes from CAD files to assist modeling. Here is how to achieve it:
Click "Customize-Interior Modeling 2.0" and select a room to enter the Modeling interface. Hover "Import" and click on "Import CAD", then click to select the surface you want to import the shape from the CAD file. Next, click "Select a file" to select a CAD file, and then you can import CAD.
