Obsidian Shard Cluster

An obsidian shard cluster: a knot of volcanic glass breaking out of the ground in five to eight sharp wedge and blade shards up to 0.9 m tall, each with curved conchoidal fracture facets (modelled shell-like scallops) and knife edges.

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