Distant trees are a blue box?

As the title says, all the trees in the distance are a blue box, and when I get closer they load.

So why does it think the 2d texture is a blue box? What file is it actually trying to point to?
This is happening in my own custom map based off GridMap too btw. And yes I have the full version, my brother owns it and I use his game.

Before turning GridMap into a seperate map

After copying the map over and changing all the directories in "UltimateTerrain.mis" to the right paths etc


So for some reason the distant trees didn't copy over even after copying the whole art folder..

Any help would be awesome

 

Well that was easier than expected, thanks a bunch!