Reshade Guide
https://drive.google.com/open?id=1XSrDiurowbQF08IxiIXKBvSWgTcUgg6M

UPDATED GUIDE:
1. Go to Reshade.me. Download it, point it towards gmod.exe and select DirectX 9. Install shaders but do not close the installer after.
2. Move Reshade-Shaders folder, D3D9, and Reshade.ini to your Bin folder.
3. Click edit settings on the installer. For the top directory, you want to point it to the Reshade.ini you put in your Bin folder. For the "Shaders" directory, point it to the Shaders folder in the Reshade-Shaders file you moved into your Bin folder. Do the same thing for the third directory, but for the Textures folder.
4. Start your game. If you see the reshade pop-up appear, you've done it correctly. Complete the tutorial it gives, make a new profile, then exit the game and move "PandaCGsBasePreset.ini" in your Bin folder.

Turn off the Technicolor if everything is too colorful. Turn off HDR and/or DPX if everything is too bright/dark. Turn off Ambient Light if you don't like the bloom (can be buggy in menus). Turn off motion blur & film grain if things are too blurry/jitter.

Config Guide
https://www.shockcoregaming.com/index.php?threads/how-to-fps-boosting-making-gmod-stunning.5121/

Other cool mods that I reccomend trying to replacing if you want:
Clean Retexture (doesn't fit most RP servers, but is much cleaner): https://steamcommunity.com/sharedfiles/filedetails/?id=1086678866 - https://steamcommunity.com/sharedfiles/filedetails/?id=450224159
Crystal Clear Sounds - https://steamcommunity.com/sharedfiles/filedetails/?id=235481161
Enhanced Audio Resources - https://steamcommunity.com/workshop/filedetails/?id=975683182
Water Retexture - https://steamcommunity.com/sharedfiles/filedetails/?id=289448471 (too sharp for my tastes)
HD Models 1 & 2 - https://steamcommunity.com/sharedfiles/filedetails/?id=1274202225 (known to be a little buggy, fix at your own risk)


THIS LIST IS MOSTLY MADE FOR ROLEPLAY SERVERS AND LOW-ACTION GAMEMODES (MADE ON NEBULOUS). CHECK BACK IN A YEAR OR SO I MIGHT UPDATE THIS AGAIN IDK.