Manhole Cover

Round cast iron manhole cover, 0.7m across, sitting flush in the sidewalk or street tile surface with a thin raised rim just proud of the slab; faceted radial tread pattern and two pry slots as shallow relief, dark weathered iron.

风格：low-poly, flat-shaded vertex colors, no textures, single shared material, so any set of these merges to one draw call; shares palette and scale with its kit