During January 2025, François Faure refactored the ViewerElement rendering logic in the BabylonJS/Babylon.js repository to improve UI extensibility. He introduced protected render hooks for the progress bar, toolbar, and overlay, enabling developers to customize these components more easily. By consolidating and simplifying the main render orchestration, François streamlined the integration of future features and customization options. His work focused on front-end development using TypeScript and web components, addressing the need for a more modular and maintainable viewer UI. The depth of the changes reflects a thoughtful approach to extensibility, though the scope was limited to a single feature update.