Normalise a glTF 2.0 binary (.glb) for a target engine and platform (scale, orientation, origin), generate two simplified LODs and convex/trimesh collision, and prove the result loads via a real Godot 4 headless import. Returns a report plus artifacts: normalised .glb LODs, collision data, a Godot scene, a multi-view preview, and the full JSON report. Claims are scoped to the Godot 4 import; Unity/Unreal receive glTF-convention output without import proof.