three.js/examples/jsm/objects/ReflectorRTT.js

import { Reflector } from '../objects/Reflector.js';

var ReflectorRTT = function ( geometry, options ) {

	Reflector.call( this, geometry, options );

	this.geometry.setDrawRange( 0, 0 ); // avoid rendering geometry

};

ReflectorRTT.prototype = Object.create( Reflector.prototype );

export { ReflectorRTT };