Murals are the fastest "architectural cheat code" in existence. You can use a mural to define a space without building a single wall. For example, use a deep-toned mural from the collection https://costacover.com/collections/wall-mural
to "carve out" a dining area in an open-concept living room, or use a "faux-textured" mural (like wood, stone, or concrete) to add a material element that the builder left out.