I kind of want to make a zombie map, but I don't entirely know how. I had one idea that when it's dark out you need light, the shared vision would be off for yourself making it so you can't see without another players help. I'm not sure if this idea would work or not, but I have an idea of some of the triggers I would use.

if u wanna make it dark u shud blind the 'survivor' with optical flare. You can do this by having a CPU medic with the sufficient energy and researched tech, the survivor has to have i think its 86 life or more and the medic shud blind em

Well, you could join this project. We've come up with a lot of innovative ideas for a zombie map (which is in production).