3d Tree branch won't cast shadows

I used Treed to created some trees and use sketchup to exported into 3ds ,then I import as NL2sco, But why the branch ( they are PNG files) cannot cast shadows made this becomes odd. Billboard trees also cannot cast shadows

Example(Left corner is NL's default tree , I want to learn how to make it but it is locked in Data pack )

[TheArchitect]

Edit the material properties in the NL2MAT or SCO, there might be a "cast shadow" option.

Thank you~ It works ????????I forgot the Alpha test first and caused Black faces on transparent areas????????but I fixed it

[TheArchitect]

Yay trees look really nice btw.

[TTD03]

Yea, they look really cool!