photorealistic architectural render of the provided whitebox model as the only ground truth strict geometry lock keep exact geometry proportions layout openings glass size door position bench volumes bench lengths bench heights and heater position exactly as in the reference model do not add extend shorten or duplicate any bench parts do not add any new objects or surfaces absolute rule very important benches render only the bench volumes that already exist in the reference whitebox no extra bench near the heater no corner bench no added seat no filler blocks no small bench piece no extensions if an element is not in the whitebox it must not appear in the render concept convert the reference model into a premium eclipse black outdoor sauna exterior full exterior cladding in deep black charred wood shou sugi ban true black matte finish subtle grain premium quality clean edges no visible screws minimal dark metal trims allowed only where the model already implies frames keep them slim and modern interior materials interior walls ceiling thermo alder warm medium brown tone premium sauna finish important interior cladding boards must be horizontal orientation on all interior walls ceiling cladding should also read as horizontal boards aligned consistently not vertical
