declare type CreateRainReturn = [
    () => void,
    () => void
];
export interface SpeedType {
    x?: number;
    y?: number;
    z?: number;
}
/**
 * create rain
 * @param size 雨滴大小
 * @param range 降雨范围
 * @param speed 降雨速度
 * @param opacity 雨滴透明度
 * @param count 雨滴密度
 * @returns
 */
export declare const createRain: (size?: number, range?: number, speed?: SpeedType, opacity?: number, count?: number) => CreateRainReturn;
export {};