Floor Target Ring

Floor target ring, a thin flat smooth ring 1 m across, 0.05 m wide, 0.006 m thick on y = 0, matte control tone; the accent glows as a thin inner line. Hover lifts it slightly and glows; pressed sits it flat; selected keeps the glow latched.

风格：low-poly, flat-shaded vertex colors, no textures, 3 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