import { ContextManager, Observable } from '@zcomponent/core';
import { UnrealBloomPass as THREEBloomPass } from 'three/examples/jsm/postprocessing/UnrealBloomPass';
import { PassConstructorProps, Pass } from './Pass';
export type UnrealBloomPassConstructorProps = PassConstructorProps;
/**
 * A bloom pass component.
 *
 * Bloom is a postprocessing effect that adds a glow to bright areas of the scene.
 *
 *
 * @zcomponent
 * @zgroup Post Processing
 * @zicon postprocess
 * @ztag three/PostProcessing/UnrealBloomPass
 * @zparents three/Object3D/Group/**
 */
export declare class _UnrealBloomPass extends Pass<THREEBloomPass> {
    constructor(contextManager: ContextManager, props: UnrealBloomPassConstructorProps);
    /**
     * The strength of the bloom.
     * @zprop
     * @zgroup UnrealBloomPass
     * @zgrouppriority 20
     * @zdefault 5
     */
    strength: Observable<number, never>;
    /**
     * The radius of the bloom.
     * @zprop
     * @zgroup UnrealBloomPass
     * @zgrouppriority 20
     * @zdefault 0
     */
    radius: Observable<number, never>;
    /**
     * The threshold of the bloom.
     * @zprop
     * @zgroup UnrealBloomPass
     * @zgrouppriority 20
     * @zdefault 0
     */
    threshold: Observable<number, never>;
}