Drain Grate Tile

An exactly 2x2m floor tile of the same 0.1m thickness as the flagstone tile so the two sit flush, but built as a stone-kerbed channel closed by a heavy faceted iron bar grate set 0.02m below the flag line, with a state knob.

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