I've been trying to add a room to a vault-like base I am using, and everything is peachy but the door to the room is invisible during the game.

The door looks fine in the GECK, and works just as expected (it's a teleport door), but it's invisible during the game and I end up looking at a gray white space !

I've tried everything - any help? Please?

Is it a Vanilla door or from a mod?

Double-click on the door in the render window. Is the 'Initially Disabled' check-box checked? If so, un-check it.

If thats not it, scroll to the 'Enable Parent' tab. If there is something there, remove it by selecting 'none'.