Landscape is Black with directional light

[Cissoid]

Hello,

i have a problem, i made a landscape and a landscape matertial.
with directional light its completely black.

With point lights its not black but also strange only one direction, here some images.

Only directional light

with point lights

material

[Cissoid]

Ok, i found the problem, the layer blend for normal maps need the exact same naming.
Like Sand|Sand and not Sand|Sand_Normal.