How to Projection Shadow to "Unlit" Material?

Development Rendering
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1

I want to set the landscape material “Unlit” to improve performance. But the landscape can not accept the static object’s shadow. Whether there is a way to use the landscape material “Unlit”, but also can accept shadow?

2

TRY BLOB SHADOW FOR UE4 ON YOUTUBE . YOU WILL GET WHAT YOU NEEDED.