lighting needs to be rebuilt

No puedo renderizar la iluminación de los foliage actors.Los errores que me salen son lo siguientes: “InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or numbers of mesh instances in this component” and “Instanced meshes don’t yet support unique static lighting for this LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.”
Soy principiante en UE4 y no se casi nada… porfavor ayudadme!