import { ShaderMaterial, WebGLRenderTarget } from "three";
/**
 * A simple copy shader material.
 */
export declare class CopyMaterial extends ShaderMaterial {
    /**
     * Constructs a new copy material.
     */
    constructor();
    /**
     * The input buffer.
     *
     * @type {Texture}
     */
    set inputBuffer(value: WebGLRenderTarget);
    /**
     * Sets the input buffer.
     *
     * @deprecated Use inputBuffer instead.
     * @param {Number} value - The buffer.
     */
    setInputBuffer(value: WebGLRenderTarget): void;
    /**
     * Returns the opacity.
     *
     * @deprecated Use opacity instead.
     * @return {Number} The opacity.
     */
    getOpacity(value: number): any;
    /**
     * Sets the opacity.
     *
     * @deprecated Use opacity instead.
     * @param {Number} value - The opacity.
     */
    setOpacity(value: number): void;
}
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