invalidate.js

function hashRenderParams() {
  
  var hash;
  // hash your render values
  //e.g, camera parameters: camera.position.x + '|' + camera.position.y + '|' + camera.position.z
  return hash;
  
}

var hash = '';

function render() {

  requestAnimationFrame( render );
  
  // update render params
  // e.g. ease camera position
  
  var h = hashRenderParams();
  if( h !== hash ) {
    // frame invalidated, redraw
  }
  
  hash = h;
  
}