So far I've used Unity only for 2D projects. But now I need to implement a 3D scene in my game. I downloaded a tree model from the asset store and placed it in my scene. I couldn't help but notice that my light objects do not affect some parts of such tree.
It affects the leaves, but the trunk remains dark. Even with a point light right next to the trunk, it doesn't seem to be affected by the light.
The tree I refer to is the Shanty Town one: https://www.assetstore.unity3d.com/en/#!/content/44
Since I don't know much about 3D, I've been meaning to ask if this is normal behavior (the fact that the tree's trunk is not affected by light objects) and if I am expected to see other models with the same issue. Is there a way to fix this? I have someone that will make some 3D models for my game, but now I am concerned that my light objects will not properly work on his models.