Sluice Box

Timber sluice box on low trestles, a 3 m plank flume 0.5 m wide sloping 8 degrees with riffle bars across the floor, a feed head box at the top and a tailings lip at the bottom, sawn legs planted on a 0.5 m footprint multiple flat on y=0.

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