by wolgade » Sun Aug 28, 2016 9:30 am
Generally this should be possible, but probably not very simple. MHX2 does a lot ot advanced stuff automatically. First you have to find out whether the face is deformed by the face rig or shape keys. If it's deformed by bones you would set the vertex weight of your new vertices to zero. If it's deformed by a shape key you can restrict its influence by creating a vertex group or editing the already existing one. Sorry for not being more specific, but what you want to do is a bit advanced.