Board Thread:Wikia Discussion/@comment-25637142-20170715123430/@comment-25637142-20170715195347

Because the clickbox hack is square and it is easier to handle the overlay without having excess clickable zones / unclickable regions if everything else is square or rectangular. Because other buttons of the new Oasis theme are rectangular and I'm using Wikia's default button classes so the tiles inherit the shape as well.

As for transparent background images, we can go with plain background, no image at all if that is the popular demand (easier for me as well).