Forum:Background Help Needed

I'm attempting to add a background to my Wiki and am running into some trouble. I got an image commissioned previously for it, but it isn't quite fitting properly. Tile and Fix settings don't do much for it. What could be done to fix an image like this for use as a background?
 * It's probably a good idea to post the CSS you used to add the image because the problem could have been a CSS issue. When I added the background to a page on my testing wiki, it worked fine. If you're wondering what the CSS I used was, it was this:

.page-Test { background-image: url("https://vignette.wikia.nocookie.net/vtol-vr/images/5/50/Wiki-background/revision/latest?cb=20201130225929"); background-repeat: no-repeat; background-attachment: fixed; background-position: center; background-size: cover; }
 * (test was the page i tested it on) -