d8 Eight-Sided Die

D8 regular octahedron, 0.018 m between opposite vertices, eight dead-flat equilateral faces with the 0.6 mm chamfer ring, gold-leaf serif numerals 1-8 at half face height sunk 0.3 mm, opposite faces summing to 9.

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