Tank Wagon

6 m four-wheel tank wagon: a horizontal cylindrical tank on cradles held by steel straps, a top dome with hatch, short ladders and a walkway, a discharge valve, wheels turning on the rig; a livery knob of black oil tank.

风格：low-poly, flat-shaded vertex colors, no textures, 2 materials: the shared opaque one plus a distinct surface (glass, water or chrome), which stays its own mesh through mergeAssets rather than merging into the rest; shares palette and scale with its kit