refine this bathroom to a more premium architectural level make wall tiles appear as large continuous slabs with almost invisible joints reducing the visible grid significantly upgrade the shower enclosure to a frameless or ultra thin black or minimal metal profile design increase material contrast slightly by adding subtle variation between walls and floor tones while keeping a warm neutral palette improve lighting with soft directional highlights and gentle shadows to enhance depth and realism maintain a clean minimal high end european design aesthetic the result should look like a luxury real estate or hotel bathroom realistic and not ai generated use travertine look large slabs with horizontal flow and minimal joints
