Thread:JoePlay/@comment-5645230-20180607155937/@comment-171752-20180710205131

Here is the CSS they're using to do that; it appears on their MediaWiki:Wikia.css

.WikiaPageBackground { background-color:#121212; background-image:url("https://i.imgur.com/GidUDoP.jpg") !important; background-attachment: box-shadow: 0 0 20px #000000; }