export default function update( scene, dt, callback ) {
  scene.traverse( object => {
    if ( object.update ) {
      object.update( dt, scene );
    }

    if ( callback ) {
      callback( object );
    }
  });
}

export function lateUpdate( scene, callback ) {
  scene.traverse( object => {
    if ( object.lateUpdate ) {
      object.lateUpdate( scene );
    }

    if ( callback ) {
      callback( object );
    }
  });
}

export default function update( scene, dt, callback ) {
  scene.traverse( object => {
    if ( object.update ) {
      object.update( dt, scene );
    }

    if ( callback ) {
      callback( object );
    }
  });
}

--- 
+++ 
@@ -9,3 +9,15 @@
     }
   });
 }
+
+export function lateUpdate( scene, callback ) {
+  scene.traverse( object => {
+    if ( object.lateUpdate ) {
+      object.lateUpdate( scene );
+    }
+
+    if ( callback ) {
+      callback( object );
+    }
+  });
+}
Add lateUpdate() scene traversal function.
