I am struggling to create the same "cabinet/hidden pantry door". I tried the glass cabinet idea, but for me it didn't work as well because part of the exterior cabinet is visible on one side. I suppose I could add an additional panel there. But what I found works best is while in a camera view, go the the drop down menu "3D" and select "Delete Surface", then click on the cabinet wall you want to delete. And now it is not "visibly" there. It doesn't actually remove the cabinet wall, it just makes it not visible in that camera. Keep in mind, if you close the camera and then create a new camera you will have to delete the surface again. Also, if you use one camera to move about the plan you will find that you will need to "delete surface" both sides of the same cabinet wall so that you can see into the pantry as well as out of the pantry.