import { Nullable } from "@babylonjs/core/types";
import { IScene } from "../glTFLoaderInterfaces";
import { IGLTFLoaderExtension } from "../glTFLoaderExtension";
import { GLTFLoader } from "../glTFLoader";
/**
 * [Specification](https://github.com/KhronosGroup/glTF/blob/eb3e32332042e04691a5f35103f8c261e50d8f1e/extensions/2.0/Khronos/EXT_lights_image_based/README.md) (Experimental)
 */
export declare class EXT_lights_image_based implements IGLTFLoaderExtension {
    /** The name of this extension. */
    readonly name = "EXT_lights_image_based";
    /** Defines whether this extension is enabled. */
    enabled: boolean;
    private _loader;
    private _lights?;
    /** @hidden */
    constructor(loader: GLTFLoader);
    /** @hidden */
    dispose(): void;
    /** @hidden */
    onLoading(): void;
    /** @hidden */
    loadSceneAsync(context: string, scene: IScene): Nullable<Promise<void>>;
    private _loadLightAsync;
}