TikTok's trendy beauty filter ushers in new tech and new problems

A real-time special effect has flooded TikTok in recent weeks, chiseling chins, plumping lips and serving Kardashian-style makeup contours for anyone with a smartphone. While it's being touted as a remarkably convincing beauty filter, AI researchers say the effect leaves no clues to its presence, giving it unprecedented capacity to manipulate people in and outside an app that has elicited scrutiny from governments around the world.