Waypoint Beacon

Waypoint beacon, 1.2 m tall: a smooth clean diamond gem 0.34 m tall floating just above a slender smooth stem on a thin flat disc 0.24 m across on y = 0; the gem glows softly in the accent. Hover bobs the gem 0.1 m higher; pressed lowers it onto the stem.

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