[Bug] Shadows rendered only in one eye (VR - pd-upscaler DEV 11.25 build)

[papoulou]

Game: Resident Evil 3 Remake
Branch/Build: REFramework - pd-upscaler (DEV 11.25 build, compiled ~5 days ago)
Platform: VR (Meta Quest via Air Link)
Upscaler: Built-in pd-upscaler version (no external plugin used)

Issue:
In the current DEV 11.25 pd-upscaler build, shadows are only rendered in one eye when using VR mode.
The other eye receives no dynamic shadows at all, which causes intense ghosting and double-image effects — especially noticeable when blinking or moving near a dynamic light source.

What was tested:

• Happens in both first-person and third-person views.
• Happens regardless of upscaler settings (FSR2, DLSS, XeSS or none).
• Switching stereo renderer settings (AFR, ALR, Single Frame Multipass) does not resolve the issue.
• Setting stereo_renderer = 0 (Legacy Multipass) slightly reduces the visual inconsistency, but the problem still persists in the pd-upscaler branch.
• Switching back to the latest stable REFramework build (non-upscaler branch) eliminates the issue entirely — but removes upscaling support.

Expected behavior:
Shadows should be rendered identically in both eyes during VR rendering to preserve visual comfort and stereo consistency.

Additional notes:

• This issue appears specific to the pd-upscaler branch.
• May relate to how rendering passes (e.g. shadows) are distributed per eye