import { type IMaterial } from "babylonjs-gltf2interface";
import { type IGLTFExporterExtensionV2 } from "../glTFExporterExtension.js";
import { GLTFExporter } from "../glTFExporter.js";
import { type Material } from "@babylonjs/core/Materials/material.js";
import { type BaseTexture } from "@babylonjs/core/Materials/Textures/baseTexture.js";
/**
 * [Specification](https://github.com/KhronosGroup/glTF/blob/main/extensions/2.0/Khronos/KHR_materials_volume/README.md)
 */
export declare class KHR_materials_volume implements IGLTFExporterExtensionV2 {
    /** Name of this extension */
    readonly name = "KHR_materials_volume";
    /** Defines whether this extension is enabled */
    enabled: boolean;
    /** Defines whether this extension is required */
    required: boolean;
    private _exporter;
    private _wasUsed;
    constructor(exporter: GLTFExporter);
    dispose(): void;
    /** @internal */
    get wasUsed(): boolean;
    /**
     * After exporting a material, deal with additional textures
     * @param context GLTF context of the material
     * @param node exported GLTF node
     * @param babylonMaterial corresponding babylon material
     * @returns array of additional textures to export
     */
    postExportMaterialAdditionalTexturesAsync?(context: string, node: IMaterial, babylonMaterial: Material): Promise<BaseTexture[]>;
    private _isExtensionEnabled;
    private _hasTexturesExtension;
    /**
     * 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_volume glTF serializer extension with the {@link GLTFExporter}.
 * Safe to call multiple times; only the first call has an effect.
 */
export declare function RegisterKHR_materials_volume(): void;