diff --git a/app/components/story/NotebookStage3D.tsx b/app/components/story/NotebookStage3D.tsx
index a879e0a..e9e7816 100644
--- a/app/components/story/NotebookStage3D.tsx
+++ b/app/components/story/NotebookStage3D.tsx
@@ -63,15 +63,20 @@ function createMaterials(): MaterialMap {
   };
 }
 
-function cloneNotebookScene(scene: THREE.Object3D): {
+type ClonedNotebookScene = {
   root: THREE.Object3D;
   materials: MaterialMap;
-} {
+  meshes: THREE.Mesh[];
+};
+
+function cloneNotebookScene(scene: THREE.Object3D): ClonedNotebookScene {
   const root = scene.clone(true);
   const materials = createMaterials();
+  const meshes: THREE.Mesh[] = [];
 
   root.traverse((object) => {
     if (!(object instanceof THREE.Mesh)) return;
+    meshes.push(object);
 
     object.geometry = object.geometry.clone();
     const sourceMaterial = Array.isArray(object.material)
@@ -87,7 +92,7 @@ function cloneNotebookScene(scene: THREE.Object3D): {
     object.frustumCulled = false;
   });
 
-  return { root, materials };
+  return { root, materials, meshes };
 }
 
 function updateMaterialOpacity(materials: MaterialMap, opacity: number) {
@@ -96,14 +101,13 @@ function updateMaterialOpacity(materials: MaterialMap, opacity: number) {
   materials.screen.opacity = opacity;
 }
 
-function disposeNotebookScene(root: THREE.Object3D, materials: MaterialMap) {
-  root.traverse((object) => {
-    if (!(object instanceof THREE.Mesh)) return;
-    object.geometry.dispose();
-  });
-  materials.body.dispose();
-  materials.frame.dispose();
-  materials.screen.dispose();
+function disposeNotebookScene(cloned: ClonedNotebookScene) {
+  for (const mesh of cloned.meshes) {
+    mesh.geometry.dispose();
+  }
+  cloned.materials.body.dispose();
+  cloned.materials.frame.dispose();
+  cloned.materials.screen.dispose();
 }
 
 function LoadingNotebook() {
@@ -196,10 +200,7 @@ function NotebookScene({
     }
   });
 
-  useEffect(
-    () => () => disposeNotebookScene(cloned.root, cloned.materials),
-    [cloned],
-  );
+  useEffect(() => () => disposeNotebookScene(cloned), [cloned]);
 
   return (
     <group ref={rig}>