Beta 0.5

Performance and rendering fixes for Quest and Pico.

Self-contained APK: the Xonotic 0.8.6 game data is bundled, no extra download needed. Install with adb install -r Xonotic-VR-full-release.apk or SideQuest. Signed with a debug key.

Framerate roughly doubled. The September workaround for sky bleeding through walls made VR bypass the map's precomputed visibility (PVS) and walk every leaf in the level each frame — single-threaded work that measured 36 of 72 fps with 28.5 ms frames while the GPU idled at 47%. The PVS is back on, and the old behaviour is still available as vr_novis 1 if the artifact ever returns. Measured afterwards: 70–72 fps with 6–13 ms frames.

Fixed overbright weapons. r_reflectcube 0 substituted a pure white cubemap, and that reflection is added to the diffuse texture, so models with a bright reflectmask (the Vortex most of all) blew out to white. The substitute's brightness is now r_reflectcube_neutral (default 0.25).