futuristic space ring 3d model

A single massive sci-fi megastructure ring, thin but structurally solid ring, large astronomical scale, designed as a Dyson-style orbital structure, single continuous circular ring, no duplicates, no multiple rings, futuristic hard sci-fi design, irregular mechanical surface, layered metal panels and segments, embedded glowing light strips along the ring, subtle emissive lines and energy bands, dark metallic material with high-tech details, precise and clean geometry, symmetrical circular shape, high-quality 3D model, no star, no planets, ring structure only, no background, neutral presentation