# Mixed VR Setup Guide (Inside-Out HMD + HTC VIVE  Ultimate Trackers)​

 Equipment Preparation

* Quest 3 Headset
* Steam Link (launch within Quest)
* UDCAP VR Gloves
* HTC VIVE Ultimate Trackers (two, one for each hand)
* Ensure your PC has installed:
  * Steam
  * SteamVR
  * UDCAP Software
  * HTC VIVE Hub

***

### I. Enable Add-Ons

1. Launch SteamVR.
2. Go to Settings → Controllers → Manage Add-Ons.
3. Confirm **UDCAP** and **VIVE Space Calibrator** are Enabled.

**UDCAP Add-Ons:**

<div><figure><img src="/files/8gNh0Svms3r62x71VsRA" alt=""><figcaption></figcaption></figure> <figure><img src="/files/85hvH7StTFzkYPVTZTZ2" alt=""><figcaption></figcaption></figure></div>

\
**VIVE Space Calibrator：**

<div><figure><img src="/files/Cl9SGGCrNzDUO73j8hPE" alt=""><figcaption></figcaption></figure> <figure><img src="/files/vNKXWaUK07WUwkyfEjXN" alt=""><figcaption></figcaption></figure></div>

***

### II. Software & Device Startup Sequence

1. Launch UDCAP Software.
2. Launch HTC VIVE Hub.
3. Launch Steam.

Please start HTC VIVE Hub and 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 HTC VIVE Hub and Steam with the same administrator privileges.&#x20;

{% hint style="info" %}
Starting privileges of different versions of UDCAP&#x20;

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.&#x20;

Between V0.1.3 and V0.1.5: UDCAP software starts by default with administrator privileges.&#x20;

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

4. Start SteamVR.
5. Power on Quest 3 Headset → Open Steam Link → Connect to PC.

***

### III. Check SteamVR Panel Status

After connection, the SteamVR panel should display:

* ✅ Quest Headset (highlighted)
* ⚪ UDCAP Gloves (gray initially, will light up later)
* ✅ Quest Controllers (highlighted)
* ✅ HTC VIVE Ultimate Trackers (highlighted)

<figure><img src="/files/5DOF6hPv87wI6bnqPMIL" alt=""><figcaption></figcaption></figure>

***

### IV. Enable UDCAP Functionality (For Quest, Pico, etc.)

1. On your desktop, right-click the UDCAP icon → Open File Location.
2. Navigate to the **udcap-bin-win64** folder.
3. Right-click 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 %}

<figure><img src="/files/ut0vmiyF6gor4RbICXK2" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/G0GJqVYhqfspvcByWwhm" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/hjpoorZLntIxKxxHMfo7" alt=""><figcaption></figcaption></figure>

***

### V. VIVE Space Calibrator Alignment

1. Wear the UDCAP Gloves.
2. Put on the headset and open the SteamVR Menu.
3. At the bottom, switch to VIVE Space Calibrator.

<figure><img src="/files/FnzPQDBjsySmvdHPs3Dy" alt=""><figcaption></figcaption></figure>

4. Follow in-VR prompts:
   * Hold Quest Controllers and HTC VIVE Ultimate Trackers.
   * Complete all calibration steps as instructed.

<figure><img src="/files/HRU2BaUDceEVDoL4gsJo" alt=""><figcaption></figcaption></figure>

* After completion, the system will automatically align the gloves based on the tracker's position.

<figure><img src="/files/wh7QqGvXmEPGhgih0JTq" alt=""><figcaption></figcaption></figure>

### VI. UTK Tracker Configuration

1. Ensure both UTK Trackers are connected.
2. Open UDCAP Software → Space Orientation → Switch to UTK Scheme → Click "Save".

<figure><img src="/files/GbJXyTOUSjtABF5AxiQ0" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/hjJVsrdmoh5Sxg639ZlE" alt=""><figcaption></figcaption></figure>

3. Open SteamVR → Settings → Controllers → Manage Trackers.
4. Assign trackers:
   1. Left Hand: Handheld Left
   2. Right Hand: Handheld Right

<figure><img src="/files/31voKgimBK63WZvggd9f" alt=""><figcaption></figcaption></figure>

***

### VII. After completion, the system will auto-align the gloves based on tracker positions.

<figure><img src="/files/aT0fbs3kuc4NXEqzcpG8" alt=""><figcaption></figcaption></figure>


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