import { Transform } from '@gltf-transform/core';
interface GLFactory {
    (w: number, h: number): WebGLRenderingContext;
}
export interface AOOptions {
    gl?: GLFactory;
    resolution?: number;
    samples?: number;
}
/**
 * Options:
 * - **gl**: Callback taking `(width, height)` as parameters, and returning a GL instance. Optional
 * 		on web; Requires `headless-gl` in Node.js.
 * - **resolution**: Resolution of depth buffer. Default: 512.
 * - **samples**: Number of samples to draw. Default: 500.
 */
export declare function ao(options?: AOOptions): Transform;
export {};