Black materials?

Question

unreal engine

Hello, I had the following problem, I downloaded the trees from the Internet, and the textures on them, everything was perfectly superimposed, the trees look fine, but when I throw them on the stage and do Rebuilt lights, because the red sign is on, that I need to do this, all materials on the tree turn black, and if I bring some other light source to this tree, and not Directional, then in the illuminated part it is clear that the materials work, Direction light, as if it simply does not illuminate the materials of the tree, what can it be related?

Answer 1

Maybe play around with the direction of the lighting?