“A realistic 3D model of a Paris Métro entrance (Art Nouveau style) by Hector Guimard. Rectangular structure with a descending staircase, ornate green wrought-iron railings, and a metal arch labeled “METRO” in Art Nouveau font. Two tall curved lamp posts with orange glass flower-shaped lights on each side. Ground: dark asphalt sidewalk with metal studs and leaves. Interior: white ceramic tiled walls, fluorescent lighting, handrails. Realistic PBR textures (metal, glass, stone), game-ready, mid-poly, UV-mapped, neutral lighting for open-world Paris scene. No dome, no modern glass.