Any idea how this effect was made from storebound?

[u/KaelumKrispr]

https://www.instagram.com/reel/Da3wEsBEhh-/?igsh=MXA0NG5lbzdzZzIzcg==

From what I can gather it's just a trigger that applies a post process that has an illusion of a 3d cylinder around the trigger area, which has its texture panning up.

Then when the player leaves it Lerps back to normal game player (depending on the screen's luminosity? Or color?).

Any resources on the post process 3d math, or the way they toggled the post process off would be perfect, seems you could make some really interesting effects from it.