ue4.26 gpu lightmass ,many black weird things are flashing all the time？

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Hong Kong Yanting·葉
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Published on ● Video Link: https://www.youtube.com/watch?v=_UJitSOo4mc


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ue4.26 gpu lightmass ，after baking,many small black things but not shadow or ray tracing(I have already turn off ray tracing),they are flashing all the time，when I getting close they will gone,could someone know how to fix this problem,and thank you.



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Tags:
ray tracing
UE 4.26
shadows
bug
double mesh
ForceAllRayTracingEffects 0
unreal engine
weird