"Rancher Lens" style face morphing?
Can anyone provide info on the techniques used to create the Snap Inc "Rancher" lens, or how one would go about creating a lens that seemingly morphs the user's face to a custom mesh? Mainly, I'm trying to figure out how the user's face is getting UV'ed in a fairly convincing way to the custom model, it seems like there are a lot of techniques combined in this one. Thanks in advance for any help.
https://www.snapchat.com/unlock/?type=SNAPCODE&uuid=abe2365134864c85b5c46fa8a53e3304&metadata=01