Base Hand

The kit's base: a rig-ready tracked left hand on the 25 WebXR joints. Real-world scale at 0.17 x 0.05 x 0.22 m, 3,000 triangles on one material.

风格：low-poly, flat-shaded vertex colors, no textures, single shared material, so any set of these merges to one draw call; shares palette and scale with its kit