x1 is ornamentation related to/composing/pertaining to/forming an element of interior design/room content arrangement/home decoration (including wall decorations, accent walls, and focus items/centerpieces), but not a structural design/blueprint, for x2 (particular room/structure) in larger structure (such as building) x3
This is interior decoration. This is something that can be changed over the course of a weekend by a small number of people. It is a type of kumjoibimja'i.