Board Thread:Support Requests - Getting Technical/@comment-1504358-20190924145312/@comment-168424-20190924153010

So the assumption in the first post is wrong. Even the images listed aren't required and they actually have nothing at all to do with base MediaWiki software as they are part of the custom FANDOM "oasis" skin. This is why they may be marked unused.

The basic list of images you might want to customize is in Help:Theme Designer, but they aren't clearly listed together.