interior shot create a hyper realistic architectural interior render using the existing staircase model only preserve all stair dimensions and form exactly style high end modern luxury materials floating dark walnut stair treads polished travertine walls blackened steel details smoked glass balustrades matte charcoal accents lighting dramatic concealed led strip lighting beneath each tread soft ambient illumination evening mood with city views outside atmosphere sophisticated penthouse interior cinematic realism premium material textures highly realistic shadows and reflections architecture
