Volumetric light ghost trail issue (still no fix for it?)

maybe you can try this tutorial,it work for me:
Creating a photorealistic rain scene in Unreal Engine lumen tutorial

Cinematic Fog BP:

If you have problems using it for versions under 5.1. Try packing those cVars into a blueprint.

r.VolumetricFog.TemporalReprojection 1
r.VolumetricFog.GridSizeZ 256
r.VolumetricFog.Jitter 1
r.VolumetricFog.GridPixelSize 4
r.VolumetricFog.HistoryWeight 0





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