What exactly does SetGhost() do? It can only be called on actors and the wiki simply states it flags them as a ghost. Does anyone have any idea what scripts would actually check for this or use this? I noticed that in the werewolf transformation script, they actually set the player to a ghost when they transform you back into your human form, but not when transforming you into a werewolf. It's rather strange and I don't see the significance, but it must be there for a reason, right?

When creating new NPCs you can check SetGhost. I think that makes attacks and spells go straight through them.

Hm, seems plausible, but I'm not so sure.

I checked the werewolf script again and it turns out I was wrong about it not switching the player back after it is done. It seems that the player is set as a "ghost" the entire time that he is a werewolf. However, I've played as a werewolf and I've had spells hit me.

http://www.creationkit.com/SetGhost

Hmm. It's odd that the werewolf script uses this then. Guess I'll have to try and dissect it again.

Also I must say I hate that the http://www.creationkit.com/SetGhost_-_Actor page makes no mention of what it actually does, nor does it direct me to the page you linked. I assumed that was all the information the website had on the function :/