constructor( colorNode, toneMapping, outputColorSpace ) {

		super( 'vec4' );

		/**
		 * The color node to process.
		 *
		 * @type {Node}
		 */
		this.colorNode = colorNode;

		/**
		 * The tone mapping type.
		 *
		 * @type {?number}
		 */
		this.toneMapping = toneMapping;

		/**
		 * The output color space.
		 *
		 * @type {?string}
		 */
		this.outputColorSpace = outputColorSpace;

		/**
		 * This flag can be used for type testing.
		 *
		 * @type {boolean}
		 * @readonly
		 * @default true
		 */
		this.isRenderOutputNode = true;

	}
Constructs a new render output node.

@param {Node} colorNode - The color node to process.
@param {?number} toneMapping - The tone mapping type.
@param {?string} outputColorSpace - The output color space.