title: How do I stop requestAnimationFrame
body: <p>I need to remove a canvas and build a new one. I'm having a problem where I don't know how to stop/interrupt the Three.js or webGL update process. I can stop it if I force a javascript error (but that's really stupid). </p>
  
  <p>Does anyone know how to stop the process so that I don't start to pile processes that aren't doing anything useful or conflicting with the new ones?</p>