If you create a terrain and go to the terrain editor, there is an icon that says, "Save terrain". If you click on that icon, it opens up a window to save the terrain as a "terrain model" (prt) file. There are no other file formats available in this "Save terrain" function. (yes, I know you can export the file instead of saving it, but it won't be exactly the same when you re-import it)

I understand that I should have gone out of the editor and simply saved the terrain as a "Vue Object" (vob) file. However, I still don't understand why they would have a "save" function for a format you can't reload. (and the fact that the terrain editor has a save function but doesn't have a load function) It just doesn't make sense...

I'd rather stay in my lane than lay in my stain!