import type { Renderer } from 'pixi.js';
import type { Environment } from './Environment';
/**
 * Generates an environment object on the fly, This only works on WebGL2 due to some of the rendering technique use.
 * Its also fairly expensive! Good to use for debugging!
 *
 * HDR files can be found here: https://hdrihaven.com/hdri/?c=outdoor&h=dikhololo_night
 *
 * @param url - the url of the hdr environment
 * @param renderer - pixi renderer to work its magic
 * @param size - size of the environment texture does not need to be too big! 256 is a good size
 * @returns - a shiny new Environment object
 */
export declare function generateEnv(url: string, renderer: Renderer, size?: number): Environment;
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