ReShade is a post-processing injector to add new effects and enhancements to games that aren’t there by default. You can use ReShade to achieve some pretty stunning visuals in your games, and the software gives you total control over a number of settings that will let you tweak the graphics of your favorite games to your precise specifications. The most popular game that’s had ReShade injected into it has been PlayerUnknown’s Battlegrounds. However, developer and publisher PUBG Corp have announced they are adding new anti-cheat measures into PlayerUnknown’s Battlegrounds today.

However, using ReShade does have a few drawbacks. The biggest issue is the performance hit your PC will take, as ReShade can add quite a bit of strain to your GPU. There’s also the sad truth that any third-party modification to a game is bound to cause issues — whether it’s due to software incompatibilities, a lack of dev support for mods, or some other reason.
Don’t be afraid to get a ban for using Reshade. The developers have officially confirmed that players will not be punished for using shaders. But with the installed utility, the game will not start. So here is a short description of how to remove it from your computer on the example of PUBG. Read more here: https://twiftnews.com/esport/how-to-remove-reshade-from-your-games/

If you want to reinstall or remove it completely follow the instructions:
• Go to the game directory with the installed utility “SteamLibrary \ steamapps \ common \ PUBG \ TslGame \ Binaries \ Win64”.
• Delete the folder with the effects of “reshade-shaders”.
• “1.ini” file.
• “dxgi.dll”, “dxgi.ini” and “dxgi.log” are also sent to the trash.
• Restart Steam and you can play.
Also, there is a chance that you will need to reinstall the game. So, it is better not to install such programs at all, just to be sure that you won’t have any problems with bans and blocks in the game you love.
This guide can be useful for any game with reshade, just change the game directory.