A nightvision plugin that does not drop fps, mainly used for DR and KZ servers, but can be used on other mods aswell, not zombie mods though ¯\_(ツ)_/¯
Nightvision has 2 modes: Normal and Fullbright
I've also added a screen fade effect to the nightvision which can be turned off by commenting/removing line 11 (#define SCREEN_FADE).
Original author Fai (BB.O.) (his version requires a player to have nightvision goggles in their inventory).
https://forums.alliedmods.net/showthread.php?p=1681614