Speed Limit Sign

Speed limit sign, 2.4 m tall: a white rectangular plate with a black border, 'speed limit' modelled in black lettering above a big number slot that is the buyer's decal, on a galvanised U-channel post; wear fades the white, rusts the bolts.

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