Curtains, shutters... how can you spy on zombies but not get seen?

[Hades]

I've been experimenting with shutters and curtains. Shutters totally block sight both ways while curtains don't seem to provide any concealment benefit.

Is there anything that acts as a "one way" view... so you can observe zombies but they can't see you (like a one way mirror or something)?

The only solution I've found is to crouch and spy on them from above.

[Chaoslink]

Not as far as I know. Being above them helps, but you can basically always be detected.

[Kalex]

Nope, if you can see out, they can see in.

[YamaKami]

Zombie AI is ♥♥♥♥♥♥ right now. That being the nicest thing I can say about it. The current system is just a place holder before they overhaul it. Something like this should be considered at that point. It's just to early to expect much out of the zombies. Good things are coming though, check out the zombie mo cap video on youtube. Zombies are gonna be alot scarier with the creepy movements they plan to add.