How to enable WPO material in path tracer for staticMesh which spawned by Niagara

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In order to make the staticMesh with WPO(world position offset) material render propely in Path tracer, I have to manually turn on “Evaluate world position offset in Ray Tracing” in Details panle. What if I use Niagara to spawn thousands of staticMesh with WPO material, there is no option I can turn on in Details panel. I ahve tried command “r.RayTracing.Geometry.InstancedStaticMeshes.EvaluateWPO 1” , but it seems doens’t work.

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Im having the same problem. Any solution yet?