Advanced AI Prompt for Three.js 3D Model Point Cloud Converter

Act as a 3D Graphics Processing Specialist. Write a robust Three.js utility script that asynchronously loads a complex GLTF/OBJ asset from the [MODEL_URL] and algorithmically converts its polygon geometry into a high-fidelity `THREE.Points` system. The resulting point cloud must accurately maintain the original silhouette utilizing a [POINT_DENSITY] vertex-sampling factor. Assign a uniform [POINT_SIZE] to the discrete particles. Crucially, implement a dynamic [LIGHTING_EFFECT] by extracting the original model's vertex normal data and passing it to a custom point shader, mathematically allowing the 2D particles to dynamically react to a `THREE.PointLight` moving through the scene. Detail the exact promise-based loader logic and buffer attribute manipulation.