import { type IMaterial } from "babylonjs-gltf2interface";
import { type IGLTFExporterExtensionV2 } from "../glTFExporterExtension.js";
import { type Material } from "@babylonjs/core/Materials/material.js";
/**
 * TODO: Add link to specification. Specification still being drafted.
 * @experimental
 */
export declare class KHR_materials_openpbr implements IGLTFExporterExtensionV2 {
    /** Name of this extension */
    readonly name = "KHR_materials_openpbr";
    /** Defines whether this extension is enabled */
    enabled: boolean;
    /** Defines whether this extension is required */
    required: boolean;
    private _wasUsed;
    dispose(): void;
    /** @internal */
    get wasUsed(): boolean;
    /**
     * After exporting a material
     * @param context GLTF context of the material
     * @param node exported GLTF node
     * @param babylonMaterial corresponding babylon material
     * @returns promise that resolves with the updated node
     */
    postExportMaterialAsync?(context: string, node: IMaterial, babylonMaterial: Material): Promise<IMaterial>;
}
/**
 * Registers the KHR_materials_openpbr glTF serializer extension with the {@link GLTFExporter}.
 * Safe to call multiple times; only the first call has an effect.
 */
export declare function RegisterKHR_materials_openpbr(): void;