SSE Black triangles after merging

[Krieger156]

So, I'm still new to this thing.

I want to merge black hood mage and black robes mage so I can wear circlets without using the mod(Cuz I had a feeling using circlet with hood mod will break tiny spot)

So, on NifSkope it looked perfectly normal.

When tested on SSE, it went black triangles.

I tried to Spell > Batch > Update all Tangents, it gives me error.(Something about Insufficient info calculating tangents and bitangents)

So... any ideas how do I fix it?

Well I know you guys will insist using circlet with hood mods, but I just want to make it only for the hooded robes and not partial mage robes(Mage(Enchanted) Hood + Mage(Enchanted) Robes)

 

Also while I'm asking about this, can any of you teach me to merge armor mods with vanilla armor?

Want to add masks mod into hooded robes

 

EDIT: Also want to add some touch to some class on this small project

Edited July 3, 2017 by Krieger156