ID of UserTracker and SkeletonTracker is same?

ID of UserTracker and ID of SkeletonTracker is same always?
And in documentation , max number of users is 6 in SkeletonTracker but UserTracker is 5, why is it?
Thanks in advance. :slight_smile:

UserTracker ID and SkeletonTracker ID are references to the same entity - or to be more accurate - SkeletonTracker ID is a reference to the UserTracker ID. This is the same for the HAND and GESTURE trackers - each reference themselves to a body ( user ).

To get the skeleton tracker working beyond 2 bodies requires a lot of processing power - we have found that 6 is more like theoretical maximum than a practical reality.