Huh. My iPhone X works perfectly with FaceID, since iOS11, clipped to my bicycle handlebars. I swipe up, glance down, and it recognizes me + bike helmet + polar

Huh. My iPhone X works perfectly with FaceID, since iOS11, clipped to my bicycle handlebars. I swipe up, glance down, and it recognizes me + bike helmet + polarized sport sunglasses + blue sky behind me. Seems like that's about as tough a use case as it could get short of a scarf covering my face (in which case I don't really think I want FaceID to work anyway).