Bring 3D model files into a Unity game — import, optimise and wire them into prefabs. Built for AI image-to-3D output (Tripo / Hunyuan3D / Meshy / Rodin, usually `.glb`), works for any GLB/GLTF/FBX. Load when the user has a 3D model to add, wants a 2.5D sprite to become a real mesh, 3D assets make the game lag or stutter, a model "shows in Scene, invisible in Game", or distant textures shimmer. AI meshes are photogrammetry-dense and must be decimated first (gltf-transform CLI); Unity needs glTFast for GLB. Static props only: rigged, animated characters are `unity-rigged-character`, because glTFast cannot produce an Avatar.