Same material for both front and back planes. The scene uses DirectionalLight. how to remove shadows.
You could turn off cast shadows on the light?

Or, you could set that mesh to cast shadows

@ClockworkOcean
Thank you for your reply. I created a new Level to set it up. The shadows disappeared. But the old Level with the same settings still has shadows. Is it a caching issue?
I think the only other thing it could be is distance fields, but then you would know, because you’d have a particular material on the green area.
