y.appendChild(this.ui.element);
            }

            static initControllers() {
                const { renderer, scene, camera } = WorldController;

                RenderManager.init(renderer, scene, camera);
            }

            static initPanel() {
                PanelController.init(this.ui);
            }

            static addListeners() {
                window.addEventListener('resize', this.onResize);
                ticker.add(this.onUpdate);
                ticker.start();
        