Laser Pointer Ray

Laser pointer ray, a thin smooth round accent core 0.003 m across with a soft glow, rising along +z for length 0.3-3 m (default 0.8) from a thin flat accent reticle ring 0.03 m across lying on z = 0, centred, facing +z. Hover widens the reticle.

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