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Release notes – Varjo Base 4.15 Release candidate

Varjo Base, Release candidate version 4.15

April 9, 2026
Supported headset models: XR-4 Series
From this release onwards only XR-4 Series headsets are supported. See 
Account Portal Downloads for compatible releases for older generation headsets.

Varjo Base release channels 

From this release onwards, Varjo Base releases are divided into Release candidates and Main releases. 

We are introducing the new Release candidate which is the feature‑ready and tested version. The purpose of the Release candidate is to ensure that it works as expected in customer setups and real-world environments. Critical bugs or quality issues found in the Release candidate will be fixed   before it is announced as a Main release. 

The Main release continues to be the fully validated version that is recommended for all users. Read more about the Varjo Base release channels. 

If you wish to share your experience or report bugs about the Release candidate, please use the Varjo Base release feedback form.


Varjo license update 

This release includes a necessary update to how Varjo Base Pro licenses are handled in Varjo Base. To continue using Varjo Base Pro features, you must update to Varjo Base 4.15. If you cannot update to Varjo Base 4.15, we have additionally published two hotfixes Varjo Base 4.14.1 or 4.13.2.  

If the update is not completed by May 9, 2026, Varjo Base Pro features will stop working. 

Read more about the Varjo license update. 


New masking settings in Varjo Base  

Added the ability to manage masks in Varjo Base. You can now import 3D models, change masking type, adjust mask position, and modify mask parameters such as anchor type, marker ID, and marker tracking type. Individual masks can also be enabled or disabled. In addition to Lab Tools files, Varjo Base now supports importing .obj files. 

Read more about Masking in Varjo Base.


New Varjo Command-line interface (Beta) features  

Added a new set of filters that simulate various times of day and daylight conditions, including Night, Cloudy, Sunset, and Sunny. 

Additionally, you can now use the command-line interface to disable room calibration and to mute Varjo system sounds. 

The simulation option for simulating an XR-4 Series headset that does not have access to Varjo Base Pro features was moved from the Analytics window to the command-line interface.  

Read more about Using Varjo Command-line interface (Beta).


Other release contents 

Varjo hand tracking: 

  • Added the ability to use hand tracking when going through room setup. 
  • Improved Varjo hand tracking stability during head movements.

Ultraleap hand tracking:

  • Improved Ultraleap hand tracking stability during head movements.

Eye tracking: 

  • Fixed an issue where pupil and iris diameters were recorded as values half their actual size (radii) in the CSV file and in the Varjo native API when logging eye tracking data. 

Varjo Base reliability improvements: 

  • Improved progress indication during headset startup. 
  • Added an update for the XR-4 Series 2026 adapter (LB-5) which extends the diagnostics for logging rare adapter restarts. 
  • Fixed an issue where the headset cameras failed to start. 
  • Fixed an issue where Varjo Base sometimes crashed unexpectedly. 

Other improvements and bug fixes: 

  • Added a Pop‑up view to Varjo Base that opens automatically when you open the Settings tab or minimize the Varjo Base window. This allows you to keep seeing the headset view without interrupting your workflow.  
  • Improved mixed reality alignment when used with SteamVR™ Tracking. (XR-4 Series 2026) 
  • Improved autofocus cameras’ idle behavior, so they wake when focus settings are changed. (XR-4 Series autofocus versions)  
  • Updated automatic autofocus camera calibration behavior. Turning it off and on in Varjo Base now resets the values and restarts the calibration process. (XR-4 Series autofocus versions) 
  • Fixed an issue where dismissing a warning in the Applications panel caused the application cards to be unusable.  
  • Fixed an issue where the device status icons in the Applications panel sometimes showed previously connected devices. 

Developer tools and APIs: 

  • Varjo native API: 
    • Fixed an issue where Varjo compositor crashed when calling Varjo native API with deprecated texture size type arguments. 
  • OpenXR: 
    • Implemented support for OpenXR 1.1. 
    • Added support for XR_EXT_spatial_anchor, XR_EXT_spatial_entity, and XR_EXT_future, which can improve mixed reality object stability for anchored objects when used with Varjo inside-out tracking.  
    • Added support for XR_EXT_view_configuration_views_change, which enables applications to be notified if the recommended view resolution changes. 
    • Fixed an issue where poses in XR_EXT_hand_interactions moved incorrectly during head movements due to an incorrect coordinate transform.
    • Fixed an issue where xrGetSystemProperties did not allow applications to use the full pixels per degree (PPD) for stereo rendering. The full PPD is now available when creating a 1.1 instance or when the XR_EXT_view_configuration_views_change extension is enabled. 

 Known issues:  

  • OpenXR:  
    • Varjo Base does not show a warning when using the Simulate option in the Analytics window that Varjo OpenXR runtime is not selected as the default runtime, which can cause unpredictable system behavior. 
The latest NVIDIA drivers verified to be compatible with this release are:

XR-4 Series
- NVIDIA Game Ready Driver 591.86
- NVIDIA Studio Driver 591.74
- NVIDIA RTX Driver Release 580 R580 U7 (582.16)