Hi,
Because it is just a Head Morphing, it is not a complete face, the file is not iFace format. The file format iwould be VNS. You can go to Head/Face/Modify to pick Head at Facial Features area. Then, you can see Custom area. You must double click it to import this head morphing.
So far, you can only utilize iClone3 to import the G3 head morphing because iClone4 uses G4 Head. The G4 Head model has not released yet; it will release in Developer Centre soon.
We apologise for the inconvenience caused.
Yours sincerely,
Mick
Technical Support
Reallusion Inc.
www.reallusion.com