styrofoam covered with fabric wall art. My daughter and I did this for her room. We used cheap painter canvas and scrapbook paper. We sprayed adhesive glue to the canvas and layed the scrapbook paper on top.
foam boards from Home Depot covered in damask fabric = gorgeous DIY upholstered wall hangings. RP: Use foam boards or MDF boards (covered w/ felt or painted) to use as back drops for photographing wall hangings.