title: UIVisualEffectView renders differently on different devices
body: <p>In my <code>ViewController.swift</code>:</p>
  
  <pre><code>var img = UIImageView(image: UIImage(named: "puddles"))
  
  img.frame = view.bounds;
  view.addSubview(img);
  
  
  var effect = UIBlurEffect(style: UIBlurEffectStyle.Light)
  var effectView = UIVisualEffectView(effect: effect)
  effectView.frame = CGRectMake(0, 0, 500, 500)
  view.addSubview(effectView)
  </code></pre>
  
  <p>The image as rendered using the code above in the <code>iPad Air</code>, <code>iPhone 5</code>, or <code>iPhone 5S</code> simulators:</p>
  
  <p><img src="https://i.stack.imgur.com/hBgL5.png" alt="woof, doesn&#39;t that look so good"></p>
  
  <p>The image as rendered using the code above in the <code>iPhone 4S</code>, <code>iPad 2</code>, or <code>iPad Retina</code> simulators:</p>
  
  <p><img src="https://i.stack.imgur.com/mb2dp.png" alt="I can&#39;t see my doge!"></p>
  
  <p><em>Note: Both images above were taken from the simulator, but this can be reproduced on actual devices running iOS 8 Beta 1 as well.</em></p>
  
  <p>Obviously, I would like to achieve the first effect on all devices. How can I achieve the same first effect on all devices?</p>