How do you make a spell work ONLY outside or in the exterior. "IsInExterior" does not work.

Game.GetPlayer().GetParentCell().IsInterior()

Grazie

Read the notes there : http://www.creationkit.com/IsInterior_-_Cell
But i don't know how the player can be in an unloaded cell...

That's good to know I don't want to crash my game.

This makes it so the spell only works inside. Is there a value I should use in order for the reverse to be true?

It's a boolean, so if you want the reverse, use a logical NOT (!) in your test.

!(Game.GetPlayer().GetParentCell().IsInterior())

Stupefacente!

Grazie, signore.