> For the complete documentation index, see [llms.txt](https://docs.existent.com/documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.existent.com/documentation/v0.0.2/guides/adding-tracked-objects.md).

# Adding Tracked Objects

- [Using Vive Ultimate Trackers](https://docs.existent.com/documentation/v0.0.2/guides/adding-tracked-objects/using-vive-ultimate-trackers.md)
- [Outside-in (Optitrack/Vicon) Setup](https://docs.existent.com/documentation/v0.0.2/guides/adding-tracked-objects/outside-in-optitrack-vicon-setup.md)
- [Aligning HMDs with outside-in systems](https://docs.existent.com/documentation/v0.0.2/guides/adding-tracked-objects/outside-in-optitrack-vicon-setup/aligning-hmds-with-outside-in-systems.md)
- [3D Print an Alignment Tool](https://docs.existent.com/documentation/v0.0.2/guides/adding-tracked-objects/outside-in-optitrack-vicon-setup/3d-print-an-alignment-tool.md)
- [Creating Digital Twins/Props](https://docs.existent.com/documentation/v0.0.2/guides/adding-tracked-objects/outside-in-optitrack-vicon-setup/creating-digital-twins-props.md)