Dark terrain when creating a new level

Something weird.. Whenever I create a new terrain and raise it, the terrain is overly dark, and if you go far away from it, it turns completely black. Mind you, this is a newly reinstalled game (Reinstalled for a different reason).

 

Holy poop, I found the problem. It's apparent that the grid texture in my game is wonky. Changing it to a different texture makes everything normal, yay!

Grid texture:


Sand texture:

--- Post updated ---
Ok, another problem. If I try to import a building from East Coast (and Garfield Heights), it imports correctly, but it has no material. How can I add its correct material?

 

copy the art folders

 

Thanks!