Three.js 3D project Conversion

I have an existing project that needs to be rebuilt in three.js so it can live natively on a product-landing page and drive our marketing campaigns. The current viewer already handles user interaction smoothly; I simply need the same experience—or better—re-implemented with three.js so it loads quickly, runs reliably on mobile,

You will receive the full source package of the current project
Your job is to mirror its behaviour in three.js, match the visual quality,

• Clean, well-commented three.js code (ES6 modules) that reproduces the viewer’s functionality
• A single HTML page demonstrating the new viewer, ready for drop-in use on our site
• Short deployment notes explaining how to swap in new GLTF/OBJ models and tweak scene settings

Cross-browser testing (Chrome, Safari, Firefox, Edge) and responsive performance on recent iOS/Android devices are required for acceptance.