code: function( bindingPoint, res ){
      var attachment = new Attachment( res );
      bindingPoint = 0|bindingPoint;
  
      this.detach( bindingPoint );
  
      this.attachments[bindingPoint.toString()] = attachment;
      this.attachmentsList.push( attachment );
  
      attachment._resize( this.width, this.height );
      attachment._attach( bindingPoint );
      return attachment;
    }
docs: The Fbo must be explicitely bound before calling this method