In layperson's terms:

This software lets you use Eye-Tracked Foveated Rendering (sometimes referred to as Dynamic Foveated Rendering) with your Pimax Crystal, Meta Quest Pro, and other headsets supporting eye tracking via OpenXR in games using the quad views rendering technique like Digital Combat Simulation (DCS) and Pavlov VR. If your headset does not embed an eye tracking device, you will be getting Fixed Foveated Rendering instead.

THIS IS NOT A UNIVERSAL INJECTOR TO ADD FOVEATED RENDERING TO APPLICATIONS THAT DO NOT IMPLEMENT IT. This software can only be used with applications that implement quad views rendering.

In technical terms:

This software enables OpenXR apps developed with XR_VARJO_quad_views and optionally XR_VARJO_foveated_rendering to be used on platforms that do not typically support those extensions. It composes each quad view projection layer into a stereo projection layer, and uses the eye tracking support on the device to make the inner projection views follow the eye gaze.

Read more about it: What is Quad Views rendering?.

DISCLAIMER: This software is distributed as-is, without any warranties or conditions of any kind. Use at your own risks.

1. Compatibility
2. Setup
3. Configuration
4. Troubleshooting
5. Special thanks
6. Donate

Before installing, check the compatibility tables below for both hardware and application support.

Headset	I use...	Support eye tracking?	Notes
Bigscreen Beyond 2e	SteamVR OpenXR	Yes
HP Reverb G2 Omnicept Edition	SteamVR with Oasis	Yes
HP Reverb G2 Omnicept Edition	WMR OpenXR	Yes	Requires OpenXR-Eye-Trackers
HP Reverb G2 Omnicept Edition	SteamVR with WMR	Yes	Requires OpenXR-Eye-Trackers
Meta Quest Pro	Oculus OpenXR	Yes
Meta Quest Pro	VirtualDesktopXR (VDXR)	Yes
Meta Quest Pro	SteamVR with Virtual Desktop	Yes
Meta Quest Pro	Steam Link	Yes
Meta Quest Pro	SteamVR with Oculus Link	No [1]
Pico Neo Pro 3/4	SteamVR OpenXR	No
Pimax Crystal/Crystal Super	Pimax Play OpenXR	Yes
Pimax Crystal	PimaxXR	Yes
Pimax Crystal Super	PimaxXR	No	PimaxXR is too old and lacks Crystal Super support
Pimax Crystal/Crystal Super	SteamVR OpenXR	Yes	Requires OpenXR-Eye-Trackers
Pimax 5K/8K (w/ Droolon Pi1)	PimaxXR	Yes
Pimax 5K/8K (w/ Droolon Pi1)	SteamVR OpenXR	No
Play For Dream MR	VirtualDesktopXR (VDXR)	Yes
Play For Dream MR	SteamVR with Virtual Desktop	Yes
Play For Dream MR	SteamLink	Yes
Play For Dream MR	PCVR Stream	No
PlayStation VR2	SteamVR OpenXR	Yes	Requires PSVR2 Toolkit
Samsung Galaxy XR	VirtualDesktopXR (VDXR)	Yes
Samsung Galaxy XR	SteamVR with Virtual Desktop	Yes
Samsung Galaxy XR	Galaxy Link	No
Varjo Aero	Varjo OpenXR	Yes	You may also use Varjo's own implementation of quad views (included in Varjo Base) [2]
Varjo Aero	SteamVR OpenXR	Yes	Requires OpenXR-Eye-Trackers
Varjo VR-3/XR-3	Varjo OpenXR	Yes	This implementation does not support Bionic Display: you may instead use Varjo's own implementation of quad views (included in Varjo Base) [2]
Varjo VR-3/XR-3	SteamVR OpenXR	Yes	Requires OpenXR-Eye-Trackers
Vive Pro Eye	SteamVR OpenXR	Yes	Requires Vive Console for SteamVR

[1] Support in SteamVR for Oculus would require Oculus to provide a public OVR API to retrieve eye tracking data, which they currently do not offer.

[2] Why using Quad-Views-Foveated (this project) instead of Varjo's own implementation?

Both Quad-Views-Foveated and the platform software for Varjo and Somnium provide similar functionality, however Quad-Views-Foveated has advantages over the other implementations:

• It allows the peripheral/focus resolutions to be fully customized;
• It forces applications with quad views rendering but not foveated rendering support to use foveated rendering. This was originally achieved through Varjo-Foveated;
• It provides AMD Contrast Adaptive Sharpening (CAS) for the focus region for a crisper image;
• It provides customizable transition (alpha-blending) from the focus region to the peripheral region.

The program will operate in Fixed Foveated Rendering mode.

Headset	Tested?
Bigscreen Beyond	Yes
HP Reverb G2	Yes
HTC Vive	Yes
HTC Vive Cosmos	Yes
HTC Vive Focus	Yes
HTC Vive Pro	Yes
MeganeX Superlight	Yes
Oculus Quest 2/3	Yes
Oculus Rift	Yes
Pico Neo 3/4	Yes
Pimax 4K/5K/8K	Yes
Pimax Crystal Light	Yes
Valve Index	Yes

This software works with any GPU. Unlike the more traditional foveated rendering techniques based on Variable Rate Shading (VRS) and requiring Nvidia cards, the quad views method works with any GPU.

Application	Supported?	Notes
DCS World	Yes	Must use OpenXR; See application notes below for quirks
Pavlov VR	Yes	Nothing special - works out-of-the-box

Other OpenXR tools are supported as well. List of what is known to work or not work so far:

Application	Supported?	Notes
OpenKneeboard	Yes
Hand Tracking Cockpit Clicking	Yes
OpenXR OBSMirror	Yes
XRNeckSafer	Yes
OpenXR-MotionCompensation	Yes

Note that the order of loading of the API layers often matter. Please use OpenXR-API-Layers-GUI to reorganize API layer in a convenient way!

See the very specific instructions DCS World.

PLEASE DO NOT HOTLINK TO THE DOWNLOAD LINK BELOW - INSTEAD LINK TO THIS PAGE THAT COMES WITH BOTH THE DOWNLOAD LINK AND ALL THE NECESSARY INSTRUCTIONS! THANK YOU

YOU MUST COMPLETE ALL THE STEPS BELOW - IN ADDITION TO INSTALLING THE TOOL, YOU MUST FOLLOW THE INSTRUCTIONS SPECIFIC TO YOUR HEADSET AND SPECIFIC TO YOUR APPLICATION (IF ANY)

Quick download link: Quad-Views-Foveated-1.1.3.msi

Download the latest version from the Releases page. Find the installer program under Assets, file Quad-Views-Foveated-<version>.msi.

You might need to install the latest Visual C++ Redistributable.

Run the installer and follow the instructions to complete the installation.

Follow the additional steps specific to your headset in order to enable eye tracking (when applicable):

• Meta Quest Pro
• Play For Dream MR
• Samsung Galaxy XR
• Pimax Crystal
• Pimax 5K/8K (w/ Droolon Pi1)
• Varjo Aero/Varjo VR-3/XR-3
• Vive Pro Eye
• HP Reverb G2 Omnicept Edition
• PlayStation VR2

Take a look at additional notes specific to your applications, such as recommended settings or incompatible settings.

You may watch Str][kerTV's tutorial video for a visual walkthrough for Digital Combat Simulator:

THESE STEPS WILL WORK EVEN IF YOU ARE NOT USING OPENXR THROUGH STEAMVR!

You can temporarily disable (without uninstalling) the software. Open SteamVR, then in the 'SteamVR Settings', go to the 'OpenXR' tab, then click 'Manage OpenXR API Layers'. Find the 'Emulate quad views foveation support' entry and toggle it off. You may re-enable it at any point by toggling it back on from the same menu.

You can use 'Add or remove programs' (available from the Start Menu) and uninstall 'OpenXR-Quad-Views-Foveated' from there.

The default configuration should be sufficient for most users. You probably do not need to modify the configuration file.

Please refer to this page for advanced configuration.

Please refer to this page for troubleshooting issues.

Thanks to my beta testers for helping throughout development and release (in alphabetical order):

• BARRACUDAS
• edmuss
• MastahFR
• mfrisby
• Omniwhatever
• xMcCARYx

Donations are welcome and totally optional. You may use GitHub sponsorship or Ko-fi to make a donation.

Thank you!