# Psychtoolbox 3.0.19.5 release “Eye to eye” released

**URL:** <https://psychtoolbox.discourse.group/t/psychtoolbox-3-0-19-5-release-eye-to-eye-released/5174>\
**Category:** Announcements\
**Tags:** release\
**Created:** [November 17, 2023, 2:04am UTC](https://psychtoolbox.discourse.group/t/psychtoolbox-3-0-19-5-release-eye-to-eye-released/5174 "2023-11-17T02:04:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mariokleiner](https://avatars.discourse-cdn.com/v4/letter/m/13edae/32.png) [@mariokleiner](https://psychtoolbox.discourse.group/u/mariokleiner)\
**Post date:** [November 17, 2023, 2:04am UTC](https://psychtoolbox.discourse.group/t/psychtoolbox-3-0-19-5-release-eye-to-eye-released/5174/1 "2023-11-17T02:04:24Z")

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The Psychtoolbox v3.0.19.5 update “Eye to eye” was released on 17th November 2023.  
As usual, the complete development history can be found in our GitHub repository.  
The release tag is “3.0.19.5”, with the full tree and commit logs under the URL:

[https://github.com/Psychtoolbox-3/Psychtoolbox-3/tree/3.0.19.5](https://github.com/Psychtoolbox-3/Psychtoolbox-3/tree/3.0.19.5)

[This Psychtoolbox release was fully sponsored by Mathworks under the year  
2023/2024 contract.](https://www.mathworks.com/solutions/neuroscience.html)

This is the last release built and tested with Matlab R2022b. Future development  
and user support will immediately switch to Matlab R2023b after this announcement,  
as we no longer have access to earlier Matlab releases, but Psychtoolbox is expected  
to continue to work just fine on older Matlab versions.

### Highlights:

- Eye gaze tracking support for OpenXR supported devices via `PsychVRHMD()`, ie.  
Virtual Reality (VR) / Augmented Reality (AR) / Mixed Reality (MR) Headsets  
with built in eye trackers and suitable eye tracking runtimes!

### All:

- OpenXR VR/AR/MR/XR eyetracking support. See above.

- PlayMoviesDemo.m: Some performance optimizations for high fps HDR movie playback.

- `CreateResolutionPyramid()`: Fix and deuglify MipMapDownsamplingShader.

- Minor bug fixes, documentation updates and improvements.

### Linux:

- Psychtoolbox was built and lightly tested against Matlab R2022b and Octave 6.4.

- OpenXR VR/AR/MR/XR eyetracking support. See above.

### Windows:

- Psychtoolbox was built and lightly tested against Matlab R2022b and Octave 7.3.

- Additionally to OpenXR eyetracking, also SRAnipal binocular eyetracking on  
suitable HTC HMDs, as tested with the HTC Vive Pro Eye.

### macOS:

- Psychtoolbox was built and lightly tested against Matlab R2022b and  
Octave 8.3 from HomeBrew. Octave 8.4 was also lightly tested and seems fine.

Enjoy!