# Adding Tracked Objects

- [Using Vive Ultimate Trackers](/documentation/v0.0.1/guides/adding-tracked-objects/using-vive-ultimate-trackers.md)
- [Outside-in (Optitrack/Vicon) Setup](/documentation/v0.0.1/guides/adding-tracked-objects/outside-in-optitrack-vicon-setup.md)
- [Aligning HMDs with outside-in systems](/documentation/v0.0.1/guides/adding-tracked-objects/outside-in-optitrack-vicon-setup/aligning-hmds-with-outside-in-systems.md)
- [3D-Print an Alignment Tool](/documentation/v0.0.1/guides/adding-tracked-objects/outside-in-optitrack-vicon-setup/3d-print-an-alignment-tool.md)
- [Creating Digital Twins/Props](/documentation/v0.0.1/guides/adding-tracked-objects/creating-digital-twins-props.md)