text: /**
   * @author bhouston / http://clara.io/
   */
  
  THREE.CubeTexturePass = function ( camera, envMap, opacity ) {
  
  	THREE.Pass.call( this );
  
  	this.camera = camera;
  
  	this.needsSwap = false;
  
  	this.cubeShader = THREE.ShaderLib[ 'cube' ];
  	this.cubeMesh = new THREE.Mesh(
  		new THREE.BoxBufferGeometry( 10, 10, 10 ),
  		new THREE.ShaderMaterial( {
  			uniforms: this.cubeShader.uniforms,
  			vertexShader: this.cubeShader.vertexShader,
  			fragmentShader: this.cubeShader.fragmentShader,
  			depthTest: false,
  			depthWrite: false,
  			side: THREE.BackSide
  		} )
  	);
  
  	this.envMap = envMap;
  	this.opacity = ( opacity !== undefined ) ? opacity : 1.0;
  
  	this.cubeScene = new THREE.Scene();
  	this.cubeCamera = new THREE.PerspectiveCamera();
  	this.cubeScene.add( this.cubeMesh );
  
  };
  
  THREE.CubeTexturePass.prototype = Object.assign( Object.create( THREE.Pass.prototype ), {
  
  	constructor: THREE.CubeTexturePass,
  
  	render: function ( renderer, writeBuffer, readBuffer/*, deltaTime, maskActive*/ ) {
  
  		var oldAutoClear = renderer.autoClear;
  		renderer.autoClear = false;
  
  		this.cubeCamera.projectionMatrix.copy( this.camera.projectionMatrix );
  		this.cubeCamera.quaternion.setFromRotationMatrix( this.camera.matrixWorld );
  
  		this.cubeMesh.material.uniforms[ "tCube" ].value = this.envMap;
  		this.cubeMesh.material.uniforms[ "opacity" ].value = this.opacity;
  		this.cubeMesh.material.transparent = ( this.opacity < 1.0 );
  
  		renderer.setRenderTarget( this.renderToScreen ? null : readBuffer );
  		if ( this.clear ) renderer.clear();
  		renderer.render( this.cubeScene, this.cubeCamera );
  
  		renderer.autoClear = oldAutoClear;
  
  	}
  
  } );
  