title: Animated fade in Bootstrap/CSS
body: <p>I am wondering if there is a way to achieve this fade-in effect of the pictures when hovering over them with the accompanying button appearing using bootstrap/CSS.</p>
  
  <p>This design agency(<a href="http://riotdesign.eu/en/blog/page/2/?_=1398082943473" rel="nofollow">http://riotdesign.eu/en/blog/page/2/?_=1398082943473</a>) does it on their blog and it looks really cool. I wasn't able to discern how to do it from looking at the code through inspector. Any guidance on where I can learn about this feature would be appreciated. </p>