The walls on the Smelting Halls have proven to be easily passed through with the skill Transplant.
I’ve managed to do it 3 times, it seems to be easier while using the skill parallel to the wall or while using the skill from point A to B whilst there’s off the boundaries terrain in between.
Unsure if this has been reported before but I’m sure it has, however, haven’t been able to find a thread.
https://imgur.com/ovyBqyS.jpg
https://imgur.com/0upZkMm.jpg
https://imgur.com/k6Olnps.jpg