Johnny Chung Lee, one of the main developers behind Kinect, has left Microsoft for Google.
He made the announcement on his blog.
"Very recently, I have left Microsoft to join a special projects team at Google," said Lee.
"After more than two-and-a-half years working as a core contributor to the human tracking algorithms for Kinect, it was an extremely difficult decision and I leave behind many great colleagues in Redmond."
Lee joins a special projects team at Google.