How can I make an effect like this when stepping further into a corridor?

[nimble olive]

With code

[visual umbra]

i mean thats not really helping

[tepid mist]

Well you'd have some effect that activates when they pass a threshold.

It'd then increase / decrease things based on how close / far the player is from some point.

1. Activate Effect
2. Update the effect based on distance (transparency, text swap speed, GUI transparency, etc)