d4 Pyramid Die

Classic d4 regular tetrahedron, 0.018 m edge, four dead-flat triangular faces with the 0.6 mm chamfer ring, top-read numbering: every face carries three small gold-leaf serif numerals sunk 0.3 mm, one tucked near each corner.

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