fktifzobr
Auto-translated
I found a solution to the shadow problems for those who are not familiar with Maya or 3D Max.
This can be done using NifSkope.
Open the head in NifSkope and immediately export it without selecting anything; this will export it completely.
In Maya, it will look like this:
You can then safely delete the head and other parts as desired (for example, the mouth and eyebrows).
Next, go back to NifSkope, right-click on the face, and select the function shown in the screenshot.
Now you can export only the face, and it will be imported in this form:
Now you can save one thing and then use the import function to combine the two files.