import { Engine } from "../Engine";
import { EffectMaterial } from "../material/EffectMaterial";
/**
 * Particle Material.
 */
export declare class ParticleMaterial extends EffectMaterial {
    /**
     * Create a particle material instance.
     * @param engine - Engine to which the material belongs
     */
    constructor(engine: Engine);
    /**
     * @inheritdoc
     */
    clone(): ParticleMaterial;
}
