add a full height backsplash behind the open shelves above the sink using the same existing countertop stone material continuous slab match no change in material color or pattern extend the stone vertically from the countertop surface up to the underside of the upper cabinetry ceiling line in that specific area only ensure the rest of the backsplash remains unchanged and uninterrupted do not introduce tile pattern changes or new materials anywhere in the scene preserve all cabinetry shelving hood and all other architectural details exactly as they are
