In Final Fantasy 16, a recent video game, when looking towards the setting sun, one sees several circles, which seem like the lens flare that one commonly sees in games. But the most prominent (circle) is this cardioid/fish-like curve that loops in on itself. I've never seen this before. FFXVI has insane polish, so I don't think this is some random mistake by the devs. Does this phenomenon have any basis in reality? Is it just some weird stylistic choice? Or is it just a graphical mistake?
Here's an image from ffxvi, demonstrating what I'm talking about.