Hello @djlee Welcome to Microsoft Q&A Platform and thanks for your query.
_There is no technical limit to the number of bodies that can be tracked within the FOV of the camera. That said there probably is a practical limit based on the field of view of the camera and amount of compute available. The amount of GPU compute required depends on the depth camera mode (# of pixels) and fps. The amount of CPU compute required depends on the number of bodies being tracked.
The recommended minimum system requirements are based on NVOV unbinned at 30fps with 5 bodies being tracked._
Please let us know if you need further help in this matter, ref.