entListener('resize', onWindowResize, false);
    function onWindowResize() {
      camera.aspect = window.innerWidth / window.innerHeight;
      camera.updateProjectionMatrix();
      renderer.setSize(window.innerWidth, window.innerHeight);
    }

    let splatURL = await getAssetFileURL("butterfly.spz");
    const butterfly = new SplatMesh({ url: splatURL });
    butterfly.scale.setScalar(0.5);
    butterfly.quaternion.set(1, 0, 0, 0);
    butterfly.position.set(-0.5, 0, -1.5);
    modifiers.setWorldNorma