You can use textures or models in the custom wall-ceiling section to create a hidden frame door. The steps are as follows:

Method 1:
Click on the wall. There is a small scissor icon in the tool. After cutting out the door-shaped area, drag and drop the door texture onto the section of the wall that was cut. The texture can be found under "Cloud material" – "Finishing" – "Decorative map" – "Door".

Method 2:
Use the custom wall and ceiling function to create the background wall for the hidden frame door. The steps are as follows:

1. Go to the custom wall and ceiling section, click on "Background Wall Design", draw the hidden frame door area with a rectangle, and then add the integrated door panel into that area.

2. Switch to 3D mode and drag the texture from the left panel to replace the pattern.

Method 3:You can directly select a hidden frame door from the custom solid wood module to add to the design.