Hi, I'm working on a 2D drawing of a section of a building. I want to integrate some objects (drawn with CAD) inside the colored surface of my rooms, and the surface of these objects will have its own colors. So that the colors of the room and the object don't overlap, I want to subtract the surface of my object from the surface of my room. But when I click on "subtract surfaces", my object disappears.
Does anyone have any idea how I can solve this problem?