Edit: The problem was caused by a disable until activated script on the trapdoors... With a duplicate trapdoor with the script removed this baffling problem has been fixed.

So I decided to try to make a rather... Unusual mod that I'm surprised apparently doesn't exist for Morrowind yet. The mod will be called Balmora Skyscraqer... And it will involve just that, a very tall tower in Balmora, with bridges built into it, connecting to smaller towers that are elevated atop mountains and so on. Here's pictures of the tower itself... http://imgur.com/a/v5pOfIt's quite a large tower as you can see here.

It's currently placed a bit too close to one of the bridges, so if this mod is salvageable I'll either move the tower or the bridge itself. Anyways it was a bit of an experiment, I wanted to do something never done before, something to improve the atmosphere a bit, and further improve potential exploration. The idea this time around, was to make a skyscraqer for Balmora, because I've never seen such a mod before.

It was all going well until... The trapdoors started disappearing. The trapdoors that are very important for maintaining immersion when traveling through the tower.

http://imgur.com/a/po7bu

In the first in game screenshot the trap door is missing... Yet in the second screenshot it is there in the Creation Kit. I even deleted this test character, and created a new test character, and it still won't show. Any clue what's going on or how to fix this problem? Or if this problem even can be fixed? Any advice would be highly appreciated.

Are you using multiple .ESPs to make this mod? Perhaps you could post your load list.

I made a new character with only the official expansions active- Bloodmoon and Tribunal and the trapdoors are still disappearing. I even toggled collision to make sure they didn't get buried under anything. The good news is it isn't some type of mod conflict, the bad news is whatever is causing this seems rather mysterious.

I know I have had times where stuff has disappeared mysteriously on me. But I can't recall causes beyond what you have already looked into. If you like, I can take a look at the plugin and see if I notice anything or reproduce the issue.

What would be the best way for me to upload the plugin? Should I upload it to TES Nexus with a "Warning this is in early BETA and isn't really ready to be used in a serious play-through yet"? Or is there somewhere else to upload such files?

Edit: HMM I figured out what the problem was... I just now noticed this script on the trap doors... I now made duplicate versions with the script removed.

For future reference, the generic trap door ID that you want to use for this application is "ex_h_trapdoor_01".