that sounds like a infrared vision script and not like a nightvision! But beside this i do not know how can a character shine without using shaders!
Quote: "If you have 1.19 or 1.20 beta than I can make you a script."
i am interested in such a script, because i just can do something similar with alttextures and this let the npc not shining!
maybe you want to use this shader. Because just with scripts this is not possible, i think!
try this shader with a postprocess script and this must do what you want!
http://forum.thegamecreators.com/?m=forum_view&t=195189&b=21
Public void likeFpsc{ System.out.println("I like FPSC!" ) ;}
http://forum.thegamecreators.com/?m=forum_view&t=196656&b=24