Cave light

The cave I created under the terrain still receives the sky light, the light will pass through the terrain, how can I make the terrain cover the sky light?

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It looks like the view mode is set to Unlit. Change it to Lit.

thank you first,but when i make it lit,Light can still cross the terrain,how to protect the terrain from the external light?

You’d have to place some static meshes, to make thee ceiling.

i get it,thank you