create a highly photorealistic architectural visualization based on this image important preserve the existing architecture camera perspective and geometry exactly as shown do not redesign or reinterpret any elements do not add new architectural elements do not change the staircase walls or railing geometry do not add or remove any railing posts or bars keep the exact handrail path bends and circular end scrolls remove all red and green temporary modeling markers from the railing do not replace them with ornaments yet materials the staircase and landing are made from light grey fine grained natural granite with a slightly rough non polished surface the wall coping stones are made from the same light grey granite the wooden areas integrated into the wall coping are individual natural oak slats installed flush with the surrounding granite use a muted natural oak tone with a subtle grey beige character avoid yellow or orange wood tones the railing is made from dark matte traditionally forged raw iron it should have a subtle handcrafted surface without excessive rust and without glossy modern coating the surrounding exterior ground is made from reclaimed small format granite cobblestones use predominantly grey stones with subtle natural variation in tone surface and edges the reclaimed stones should feel authentic and slightly irregular but not colorful or chaotic the fa ade is finished in clean freshly renovated white mineral plaster with a subtle realistic surface texture lighting and realism transform the simple architectural model appearance into a convincing architectural photograph use natural daylight realistic soft shadows subtle contact shadows and physically believable material response add restrained natural microvariation to stone wood plaster and iron avoid exaggerated textures artificial stains excessive weathering or blotchy ai generated surfaces the result should look like a high quality photograph of a newly completed and carefully restored entrance most important materialize the existing design do not redesign it preserve the geometry exactly