It would be good to have a normal zombie flicker between this in certain psi zones , so it is a hallucination effect, Maybe a one off when you do the first scientist task in the railway tunnel. You could extend the effected area of that artefact you pick up and make the waves hit as soon as you pass the train wreck in the entrance then you could have three zombies that flicker in a heavily psi affected tunnel.
Ha ha. Creative work
Now you don't want to turn around in a pitch black tunnel and turn on your flash light to find one of these staring at you.
Looking at these its hard to imagine what will they think of next...
It would be good to have a normal zombie flicker between this in certain psi zones , so it is a hallucination effect, Maybe a one off when you do the first scientist task in the railway tunnel. You could extend the effected area of that artefact you pick up and make the waves hit as soon as you pass the train wreck in the entrance then you could have three zombies that flicker in a heavily psi affected tunnel.
That's a great idea man, keep up the good work!