Board Thread:Support Requests - Designing Your Wikia/@comment-26334172-20151111051307/@comment-9605025-20171103232052

You need to use the URL of the image file itself. It doesn't matter whether or not it is uploaded to your wiki; although that is the safest option. As far as I know, Wikia does not block image URLs in CSS. The obvious exceptions is if it was shows to not actually be an image or doing so is a copyright violation and they received a complaint.

In the future, please do not bump threads that are 2 years old. Even if the issue is the same, there is a chance the solution is not.