I think there is a bug in 5.6 Preview. When I enable Evaluate World Position offset on a mesh that is placed with the foliage tool. No Lumen Reflections and GI is affecting the scene. When i disable it everything looks right again. Someone else noticed this problem?
When I go into the Lumen Debug view I also can’t see these meshes. As if there is no proxy mesh created for them. (Applies to nanite meshes only apparently)