Black Rock Shoreline Tile

A 4 x 4 m tile of the black rock coast on the kit's 0.06 m slab, base at y=0, tiling-edge vertices exactly at +/-2: the inland half (-Z) a level bare basalt shelf.

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