add elegant spherical cabinet knobs made of natural travertine to every individual wardrobe and cabinet front visible in the existing visualization the knobs should have a perfectly rounded sculptural shape a warm beige travertine color and subtle natural stone pores and veining use a refined minimalist design with a matte honed finish matching the natural travertine bowl already present in the scene place one spherical travertine knob on each individual cabinet front ensuring that every door and drawer front has its own handle position each knob consistently and realistically following the centerline and appropriate ergonomic placement of each respective front keep the knobs proportionate to the size of the fronts with a sophisticated understated appearance critical requirements edit the existing visualization only do not change the camera angle perspective composition or image proportions do not alter the cabinet geometry dimensions divisions or material finishes preserve the existing dark walnut finish on the lower cabinet section and the light wood finish on the upper section do not change any wall finishes doors mirror lighting flooring or decorative accessories do not add any other handles hardware or decorative elements ensure the travertine knobs are clearly visible realistically attached and rendered with accurate shadows and natural stone texture final result the exact same photorealistic hallway visualization enhanced only by spherical natural travertine knobs on every cabinet front
