Pet overlays are customized pictures of a user's pet.
How to make an overlayEdit
There is no specific way to make an overlay - many people just edit the original artwork of the official pet, or some people draw an entirely different picture. It depends on the user's taste and preferences.
Some users on Anatheria are willing to make overlays in exchange for Anthers or for free. You can find such users by browsing either the fanatic board or the artwork board on the forums. You can also find overlays on most help sites also created and owned by members of the site.