import * as THREE from 'three';
/**
 * Traverse given object and remove unnecessary vertices from every BufferGeometries.
 * This only processes buffer geometries with index buffer.
 *
 * Three.js creates morph textures for each geometries and it sometimes consumes unnecessary amount of VRAM for certain models.
 * This function will optimize geometries to reduce the size of morph texture.
 * See: https://github.com/mrdoob/three.js/issues/23095
 *
 * @param root Root object that will be traversed
 */
export declare function removeUnnecessaryVertices(root: THREE.Object3D): void;