Board Thread:Support Requests - Designing Your Wiki/@comment-7920233-20131028072719/@comment-5007040-20131028090159

Hey, please try this code: background-image:url("image url here") !important; background-repeat:no-repeat !important; padding-left: 0; padding-right: 0; } Add this code to "MediaWiki:Wikia.css" on your wiki and remove "image url here" with the url of the image you want in the background.
 * 1) WikiHeader {

Hope this helps you!