i have some prefabs in the scene that are not affected by the dark directional light (with images)

i making a game and the envirement is in night so i have turned the directional light to 0 in the x axis ,the problem is that there is some prefabs that i have downloaded from the asset store that are not affected by the night (the night directional light ) those prefabs are using a shader not a materials

so what is the solution to make them affected with the dark envirement

exemple the trees and the building in the photos :

this is the parameter of the tree in the inspector

and this is the the directional light

rotation (0,-30,0)
type directional

baking realtime

intensity 1

default color