Juancho Abad, a game developer from Whale Peak Games, showed how the travel transition resembling a swirly portal made for their game Go Mecha Ball is not what it seems. Instead of some kind of elaborate setup, it's just "a horn-shaped mesh spinning or scaling."
"Proof #256 that gamedev is a lie," he said, and if you read 80 Level regularly, you know he's right.
Other developers shared their examples of similar cases:
And it's true not only for games. Even big studios, like Pixar and Walt Disney Animation, use some tricks to make sure the final image is perfect. This often means it is hilarious from some angles, but it's the result that matters.
Pixar
As for Abad's other 255 proofs, you can find them on his X/Twitter, along with gamedev that is not a lie.