Philpax

https://fosdem.org/2026/schedule/event/MMTW7N-openxr-advances-open-source-gaming/

• Latest news on the OpenXR side of things
• Updates on what Collabora is doing with Monado
• Collabora:
  • Main maintainers of OpenXR
  • Working with Khronos for many years
  • Making FOSS work for Fortune 500 customers for 20 years
• Spatial entities, extensions:
  • Persistent points in physical spaces
  • Basis for scene understanding and spatial reasoning
  • Standardised tracking for QR/Aruco/April codes
  • Discover and correlate entities across sessions
  • Util extensions for persisting and unpersisting
  • Identifying planes with semantics (wall, table, etc)
• Multi-app
  • Being worked on extensively
  • Not published
  • Have multiple apps interact spatially, and render correctly againts each other (occlusion, cross-lighting, etc)
  • MR games + desktop tools
• Best-practices validation layers
  • Best-practices validation layer for problematic API usage
  • Technically valid, but suboptimal patterns that cause performance/cross-runtim eissues
  • Early warnings during development
  • Improving portability + runtime consistency across XR platforms
  • Helps developers create more robust XR apps
• Tutorial project
  • Step-by-step guide for building an OpenXR app from setup to advanced features
  • Practical instructions, sample code, downloadable examples
  • Core topics: instance/session creation, graphics integration, input/interactions/extensions
  • Teaching OpenXR fundamentals
• OpenXR compliance boundary only covers the OpenXR API + implementations - not game engines
• Adding more transparency
  • Putting together matrices: Runtime Support Matrix and Client Support Matrix/Middleware Support Matrix
• Monado is the first fully-conformant open-source OpenXR implementation
  • Across all three platforms
  • It's a XR laboratory that allows you to test code without vendor black boxes/high costs
  • Headset makers can use it to enable thei rhardware
  • It's also accessible for academic research
• Monado 25.1.0
  • Async for non-blocking spatial queries
  • Hand-tracking data support
  • Native Linux drivers for Pico 4 Ultra / Xreal Air 2 Ultra
  • Google Cardboard capture
• Godot
  • Native Vulkan renderer optimiesd for low-latency
  • In-headset engine for edit+build entirely within VR
  • Integration funded by Khronos
  • Improves consistency, implements spatial entities, a bunch of other cool things
• LOVR
  • More features, including new render models
  • Nvidia CloudXR support
  • More recent OpenXR feature support coming
  • Maintainer has also joined Khronos
• StereoKit
• Contact Collabora if you're working on cool hardware or want a job
• Question: What is the process to update the matrix?
  • Runtime is run against the validation tests
  • Middleware is self-report, good-faith, not checked
• Question: Can users check for compliance of their software against a device?
  • No easy way without a device rn