Originally Posted by
makanyane
The .worldterrain .worldvegetation .worldpathfinding & .animinstances files are all called from within the .world file - you're probably missing or referring to the wrong .worldterrain at least... while you're at it check you've got the paths correct to the other files too!
Read your 3 binary files in IWTE for the fort - on 'worldFiles' tab click 'update referenced paths' - you need to make sure you copied those from those locations in DBM and then either put them in exactly the same place in your mod (so the .world file finds them) - OR change those paths to where you want to put them in your mod, click OK, save 3 Binary files & rename the new .world file to replace the existing one.
You'll find a similar issue with the .worldterrain file calling the masks and textures for that one use 'Terrain1' > 'Amend WT Mask TGA paths, similar to the above process.