I put together a fix for this tileset as it seems the file in the hak is corrupted and breaks the edges of the Tileset. That means it produces an effect that looks like you can just fall off the world, and even can see the sky under the map for example.
This fixes that with a file you simply drop into override. I posted on Discord as well but wanted to cover everything in case people don't use it.
https://app.box.com/s/mk9osk3abygqw4xud20b