ray trace and foliage

Hello,

is there a way to disable from foliage actors the ray trace reflections and translucency, but leave the ray trace shadows on?

I know this comand, r.RayTracing.InstancedStaticMeshes 0
but it disables everythig and as my foliage is in movable and raytrace is on, I have no cascade shadows or any shadows at all then.

If that is not possible, is there a way to work with raytrace for my “normal objects” and cascade shadows for my “foliage actors” at the same time?