Anyway, from what I can tell it's using a regular picture of a cat and applying a "depth" texture with WebGL like is demonstrated in this tutorial : tympanus.net/codrops/2019/02/20/ho...
Then I'm guessing they map the texture of the eyes on a sphere that follows the mouse pointer.
That's.... Really uncanny XD
Anyway, from what I can tell it's using a regular picture of a cat and applying a "depth" texture with WebGL like is demonstrated in this tutorial : tympanus.net/codrops/2019/02/20/ho...
Then I'm guessing they map the texture of the eyes on a sphere that follows the mouse pointer.
In any case, it's mostly WebGL.
I like that depth effect. Thanks for the answer!