About Mesh it is the same with same porperties
but set with 2 process : on the left “Foliage Instance” on the right “landscape grass type”
with: same daylight, same directional light, on the same Landscape, shadowed by a static tree from kit demo too
maybe i missed something with the new landscape grass tuto that i folowed :
[Grass Quick Start | Unreal Engine Documentation][2]