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) and/or structural design/blueprint for x2 (particular room/structure) in larger structure (such as building) x3, that is done for purely aesthetic (as opposed to functional) reasons
This ornamentation may also be expressed through the design of the space itself (it's shape, etc.); thus the definition here is wider than kumjoibimselvauja'i, which is only the decoration of the room via the inclusion and arrangement of certain contents and coloring the walls. In other words: this word includes physical changes/renovations to or choices for a structure, which are relatively hard to perform, as well as the arrangement of the contents of its interior (which is easier and is the meaning of the alternative word).