[@Argonaut] As long as it fits your background, its cool. And I think you mean normal mode, since Fast Learner would make things easy.

Like I mentioned, things that you didn't see won't appear. You can try, but there's gonna be a lot of blank spots. The holograms are gonna be from your POV.

If they leave your line of sight or peripheral vision for too long, they vanish. Too long would pertain to a few seconds; like 5-ish.

[@Lugubrious] Can't really give you a definite answer until I see the CS, but for now, no hard no's.