Animated GIFs are still often used on the Internet. Although this is an ancient format, but even in it there is a place for innovation. On the Tumblr website, the 3D GIF collection is replenished, in which a three-dimensional effect is created by simply adding two vertical white lines. Strange, but such a simple trick really works, and without any 3D-glasses.
Actually, the effect is even on static images, and there is an opinion that it has long been used in comics.
Here are some animations demonstrating the effect. ')