import { InstancedMesh, Object3D } from "three";
export declare const NEED_UPDATE_INSTANCE_KEY: unique symbol;
export declare const $isUsingInstancing: unique symbol;
export declare const $instancingRenderer: unique symbol;
export declare const $instancingAutoUpdateBounds: unique symbol;
/**
 * Utility class for accessing instancing related properties
 */
export declare class InstancingUtil {
    /** Is this object rendered using a InstancedMesh */
    static isUsingInstancing(instance: Object3D): boolean;
    /** Returns the instanced mesh IF the object is rendered by an instanced mesh
     * @link https://threejs.org/docs/#api/en/objects/InstancedMesh
     */
    static getRenderer(instance: Object3D): InstancedMesh | null;
    setAutoUpdateBounds(instance: Object3D, value: boolean): void;
    /** Mark an instanced object dirty so the instance matrix will be updated */
    static markDirty(go: Object3D | null, recursive?: boolean): void;
}