# 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​​**

1. Run ​**​UDCAP​**​.
2. 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. 

{% hint style="info" %}
Starting privileges of different versions of UDCAP 

software V0.1.6: If installed on the C drive, this version starts by default with administrator privileges; if installed on other drives, it starts by default with normal privileges. 

Between V0.1.3 and V0.1.5: UDCAP software starts by default with administrator privileges. 

Before V0.1.3: Starts by default with normal privileges.
{% endhint %}

3. Launch ​**​SteamVR​**​.
4. In the SteamVR interface, go to ​**​Settings → Startup/Shutdown → Manage Add-ons​**​ and ensure the ​**​UDCAP plugin​**​ is enabled.
5. 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)
6. Run ​**​udcap\_overlay.exe​**​.

* Udcap Driver 0.1.7.0: Main page - Menu - Click \[Connect to SteamVR]

<figure><img src="/files/hco2O0Lm9PgPHOYkdGPv" alt=""><figcaption></figcaption></figure>

* Udcap Driver 0.1.6.0 and earlier versions: Run the udcap\_overlay.exe file with administrator privileges.

{% hint style="warning" %}
The startup permission of the UDCAP\_overlay.exe file needs to be the same as that of UDCAP, Steam and SteamVR.
{% endhint %}

7. 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​**​.

8. ​**​Successful example:​**​<br>

<figure><img src="/files/rxUxYE8yUSAC3jAXrLFW" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/BO111xLj8M8Tl9cSDyJA" alt=""><figcaption></figcaption></figure>

### **​​III. Launching Space Calibrator​​**

1. Download and install ​**​Space Calibrator​**​ from the Steam Store.
2. Launch the software and confirm that the ​**​base stations and Trackers​**​ appear correctly in the SteamVR interface (as shown in the example image).

<figure><img src="/files/NUccNdRdDgnVv136WuQP" alt=""><figcaption></figcaption></figure>

### **​​IV. Tracker Configuration​​**

1. Open ​**​SteamVR Settings → Controllers → Manage Trackers​**​.
2. Assign each ​**​VIVE Tracker​**​:

   * Set the ​**​left Tracker​**​ to ​**​"Handheld—Left Hand"​**​.
   * Set the ​**​right Tracker​**​ to ​**​"Handheld—Right Hand"​**​.

   <figure><img src="/files/gZMlZ6wYs0jQLEN8zG2P" alt=""><figcaption></figcaption></figure>

### **​​V. Glove & Headset Calibration​​**

1. In the ​**​Space Calibrator​**​ main interface:

   * ​**​Left side​**​: Select ​**​Quest headset​**​.
   * ​**​Right side​**​: Select ​**​SteamVR Tracking​**​.

   <figure><img src="/files/jq04wFFilEaNeXvbVOG8" alt=""><figcaption></figcaption></figure>
2. 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.
3. After successful calibration, the ​**​VR view should display​**​:

   * ​**​Tracker​ 3.0**​
   * **Index controller​**​
   * ​**​Quest controller​**

   ​

   <figure><img src="/files/WTWJLH88hF2o0UvhFHwx" alt=""><figcaption></figcaption></figure>

### **​​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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