Files are attached.

I have adapted nortempleentrancehall01.nif to look like a Velothi tomb entrance, from Morrowind, for this mod: http://www.gamesas.com/topic/1367225-the-legend-of-jiub/

I've been successful in getting it to work in the CK and Skyrim after reshaping it correctly, but after redoing the UVs, different random parts of it won't appear in the CK or in Skyrim. They display in Nifskope just fine. Is this caused by the UV, or is it a problem that can be fixed within Nifskope?

Files:

Original: https://www.dropbox.com/s/damrole286yq4ua/nortempleentrancehall01.nif

WORKS in CK\Skyrim (bad UV): https://www.dropbox.com/s/bp1getvvox0cnub/velothientrance.nif

DNW, portions become invisible: https://www.dropbox.com/s/irpc61muf1mtp0s/velothientranceTEST1.nif