Not sure about apple face id, but the technology use by facetec.com is a face scan using video from any hd camera + ai for creating a 3D face scan, they claims it safe from attack vectors like: Paper masks with eye & mouth cutouts Hollywood masks, m wax figures & lifelike dolls https://image.nostr.build/d9734ac7e378babe70fb75690c0ddead4d7f9dea5bd3471949245efdbebcdd79.jpg