Assertion failed: !bInstancedStereoEnabled || (bInstancedMultiViewportEnabled || bMobileMultiViewFallback) [File:D:\build++UE5\Sync\Engine\Source\Runtime\RenderCore\Private\StereoRenderUtils.cpp] [Line: 125] If ISR is enabled, we need either multi-viewport (since we no longer support clip-distance method) or MMV fallback (which uses vertex layer).
Same issue when just creating and starting a new VR template project (with Meta XR plugin installed). Didn’t have issue in UE 5.3, got issue on UE 5.4.4.
Welcome back to the Unreal Engine Community Forum! If you’re running into this issue I’d try going into your DefaultEngine.ini and changing“vr.InstancedStereo=True” to “vr.InstancedStereo=False” and test again. Let me know if that fixes it for you. Thanks!