Mixed VR Setup Guide (Inside-Out HMD + Lighthouse Tracking)
I. Prerequisites
Use an all-in-one headset (e.g., Pico, Quest) with Lighthouse tracking (e.g., VIVE Tracker 2.0, 3.0).
II. Basic Startup Process
Run UDCAP.
Run Steam.
Please start Steam with the same privileges as UDCAP software to ensure consistent privileges and prevent plugin loading failures.
For example, if the V0.1.6 version of UDCAP software is installed on the C drive, it will start by default with administrator privileges, so you need to start Steam with the same administrator privileges.
Launch SteamVR.
In the SteamVR interface, go to Settings → Startup/Shutdown → Manage Add-ons and ensure the UDCAP plugin is enabled.
Power on the Quest headset and connect it to the PC. Verify successful connection in SteamVR. The interface should display:
Quest headset icon (highlighted)
UDCAP glove icon (dimmed)
Quest controller icons (highlighted)
Run udcap_overlay.exe.
The startup permission of the UDCAP_overlay.exe file needs to be the same as that of UDCAP, Steam and SteamVR.
Upon successful startup, the UDCAP glove icon should become highlighted. If it remains dimmed:
Randomly press a button on the Quest controller.
Ensure the Quest headset can track and illuminate the controllers properly.
Successful example:
III. Launching Space Calibrator
Download and install Space Calibrator from the Steam Store.
Launch the software and confirm that the base stations and Trackers appear correctly in the SteamVR interface (as shown in the example image).
IV. Tracker Configuration
Open SteamVR Settings → Controllers → Manage Trackers.
Assign each VIVE Tracker:
Set the left Tracker to "Handheld—Left Hand".
Set the right Tracker to "Handheld—Right Hand".
V. Glove & Headset Calibration
In the Space Calibrator main interface:
Left side: Select Quest headset.
Right side: Select SteamVR Tracking.
Click the Calibrate button and choose Slow or Very Slow for best results.
During calibration, ensure the Tracker is securely attached to the glove, then hold the Quest controller and trace a figure-8 motion until the progress bar completes.
After successful calibration, the VR view should display:
Tracker 3.0
Index controller
Quest controller
VI. Disabling Quest Controllers
After calibration, disable the Quest controllers or physically remove their batteries to prevent interference with glove tracking.
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