Board Thread:Support Requests - Getting Technical/@comment-5448493-20141122015005/@comment-12198205-20141122025430

Go to your wiki's MediaWiki:Wikia.css then put this following code: .WikiaHeader .wikia-header-mask { background-image: url([IMAGE URL]); background-repeat: repeat; } ^replace the [IMAGE URL] with the url of the image you want as the header mask.