diff --git a/src/components/three/ModelViewer.tsx b/src/components/three/ModelViewer.tsx
index 7cae3e7..bf1a160 100644
--- a/src/components/three/ModelViewer.tsx
+++ b/src/components/three/ModelViewer.tsx
@@ -54,11 +54,43 @@ export function elementKey(modelId: string, el: THREE.Object3D): string {
 export const sceneRef: { current: THREE.Scene | null } = { current: null };
 
 function SceneRefCapture() {
-  const { scene } = useThree();
+  const { scene, camera } = useThree();
   useEffect(() => {
     sceneRef.current = scene;
     return () => { if (sceneRef.current === scene) sceneRef.current = null; };
   }, [scene]);
+  useEffect(() => {
+    // Expose the main camera to the ViewCube bus
+    // (lazy-imported to avoid circular deps)
+    import('./viewCubeBus').then(({ mainCameraRef }) => {
+      mainCameraRef.current = camera;
+    });
+    return () => {
+      import('./viewCubeBus').then(({ mainCameraRef }) => {
+        if (mainCameraRef.current === camera) mainCameraRef.current = null;
+      });
+    };
+  }, [camera]);
+  return null;
+}
+
+/** Drives the camera animation requested by the ViewCube. */
+function ViewCubeAnimator() {
+  const { camera } = useThree();
+  useFrame((_state, delta) => {
+    // Eager require to avoid async stalling per-frame
+    const bus = require('./viewCubeBus');
+    const anim = bus.viewAnim;
+    if (!anim.active) return;
+    anim.t = Math.min(1, anim.t + delta / anim.duration);
+    const k = anim.t < 0.5 ? 2 * anim.t * anim.t : 1 - Math.pow(-2 * anim.t + 2, 2) / 2;
+    camera.position.lerpVectors(anim.startPos, anim.endPos, k);
+    camera.up.lerpVectors(anim.startUp, anim.endUp, k).normalize();
+    const controls = bus.mainControlsRef.current;
+    if (controls?.target) camera.lookAt(controls.target);
+    controls?.update?.();
+    if (anim.t >= 1) anim.active = false;
+  });
   return null;
 }