BTW the best way to achieve a night vision goggle effect is to use the vignette multiplier
this. before this, the best you could achieve was a screen overlay.
you'll need a way to get the server env's current vignette though afterwards.
one could probably just rescript the old night vision goggles (NVG on RTB, if you can't find nightvisiongoggles on an rtb archive or something) to use this new system.