From the blog "Bad Dog's Work in Progress"
Edit: For the record, this tool is implemented and has its own thread here:
I can't really do what I want to do with FO4 if I can't do proper weight painting and I don't have full control over the nifs I create. So I've decided to have a look at making proper import/export tools between Blender and FO4. I'm using this blog to track thoughts and progress notes along the way.
There are two possible routes:
Extend the niftools package. That is currently being activ