Black glass and window tint

Ive got modded cars on ym server and most have black tint on them which can be removed by the trainer but im trying to find apermanent fix and dont know what it is and if it is clinet or server side.

Google for Diffuse Tint.
Next time, search first, if you still can’t figure it out post in the correct category. This is not a FiveM issue so it doesn’t belong in #technical-support