Changelog

1.0.0 - Initial VR Edition Release

Added

• Per-eye temporal upscaling: Separate history buffers and temporal matrices for left and right eyes. Prevents cross-eye contamination that would break stereo depth.
• Stereo detection: Automatically detects when Vivecraft is rendering in stereo mode (two renderLevel passes per renderFrame).
• Shared jitter synchronization: Both eyes use the same jitter pattern per frame pair, advanced once per frame.
• VR temporal clamp: Stricter neighbourhood clamp (1.0px vs 1.5px) in taau_resolve_vr.fsh to suppress sub-pixel shimmer that causes nausea in VR.
• VR auto-resolution: Scales both eyes symmetrically based on combined stereo GPU work measurement.
• Built-in frame generation disabled in VR: When stereo is detected, the addon disables Upshift's built-in frame generator and lets the headset's reprojection handle it.
• VR configuration: Separate upshift_vr.json config with VR-specific options.
• Minimal VR overlay: Diagnostic line showing "VR: stereo gen=off (VR: headset reprojection)" when flat overlay is hidden in VR.

Technical

• No compile-time dependency on Vivecraft classes; all VR detection is runtime reflection-based.
• Flat rendering path unchanged when VR is inactive.
• Uses classTweaker access widener on base Upshift to expose internals without @Overwrite.

Requirements

• Upshift 1.6.4+
• Vivecraft for Minecraft 26.2
• Fabric Loader 0.19.5+
• Sodium (recommended)