title: CSS Background-image over HTML img
body: <p>I was wondering whether it's possible to get background-image to be on top of all html img's in a certain div (like a sort of mask)</p>
  
  <p>I tried:</p>
  
  <pre><code>#content img{
      position:relative;
      background-image:url('./images/image-mask-2.png');
      z-index:100;
  }
  </code></pre>