Static mesh not generate shadow

Hi, I want to ask why my staticc mesh didn’t generate shadow?
It look like this when open the static mesh

But in game, it look like this

Why my static mesh didn’t generate shadow like the first picture?
And how to achieve the lighting quality like the first picture

Are you sure you have a directional light source in your level, with “Cast Shadows” enabled? Also on your mesh instance in the level: make sure, that “Cast Shadow” is set here as well as checkboxes for “Static Shadow” / “Dynamic Shadow”.
Also, if your mesh is set to “movable”, you can set your directional light to stationary or movable to get shadows. The building most likely would not be a movable object, so setting Mobility to static and building lighting with correct shadow settings should solve problems.

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Thanks!
Now i can achieve much better looking visual