Removing invisible walls

[netops]

Trying to find the invisible wall that is behind a good portion of instance portals, so I can remove/edit it. Anyone able to tell me what mpq it is in / what it's called ty

[aidarius]

recognize on what map part is it ( for example azeroth_29_47.adt)then try 3 possibilities:
1 - impassable flag on adt chunk, could be removed by cryect tool named: removethewalls.exe
2 - transparent doodad barrier placed on map like other stuff (trees, fences etc), could be removed via map editor or loadinfo<>fileinfo tools
3- if your instance is wmo - have no idea , probably exporting entire model to 3ds , removing barrier, make it again wmo .

thats my suggestion