harsh stone
An anti-cheat was recently introduced to the game, making the game close when using reshade.
I won't go much in details about how it works, but it basically behaves like a cheat, so while it's technically a cheat, is only used to enhance or modify the graphics of the game to make it look more pleasing to the player, and therefore not a real threat.
That said, i think it would be a great thing to whitelist it from the anti-cheat so that we can keep using it.
Here are some examples of what you can do with reshade:
crimson glen
worldly solar