title: Unity3d Image effect blur on android too slow
body: <p>I'm playing around with <code>Unity Image Effects</code> on a 2d game, specifically I'm trying to blur background of my main menu when game settings are displayed on a popup. I've achieved by using two cameras:</p>
  
  <ul>
  <li>A main camera in which foreground objects are drawn</li>
  <li>A background camera with the blur (optimized) effect which properties I programmatically change when settings are displayed</li>
  </ul>
  
  <p><a href="https://i.stack.imgur.com/wIODp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wIODp.png" alt="enter image description here"></a></p>
  
  <p>It's working great on Unity Editor, but once I run it on a device (<code>Galaxy S6</code>) it gets terribly slow. I'm guessing blur effect is just too much for handheld devices, but still I wonder if I could get better results just tweaking camera params, it's hard to believe that a (almost) last generation device can't move this scene (just a fullscreen background with the blur effect and a couple of buttons on top of it) smoothly.</p>
  
  <p>Any idea of things I could try to improve performance?</p>
  
  <p><em>As a side note, I'm rendering my sprites with <code>2dToolkit</code>.</em></p>