Turntable

Locomotive turntable on its own 20 x 20 m 0.06 m slab with tiling edges at exactly +/-10 m: a shallow circular pit 20 m across with a stone coping and a circular running rail, its floor the slab itself with nothing below y = 0.

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