The Aren Eggmine is a cave interior constructed out of mold-rocks rather than proper int pieces, while not game breaking and the location is for now out of the way this is still an ugly annd obvious break from standards, which should be rectified.
Dondril has lots of individual assets to make parts of the walls/platforms. The cell as over a thousand refs and this is contributing to it quite a bit.
The door leading from Tomaril Manor, Guard Tower: Upper Levels to the exterior plops the player inside some collision mesh where you can't move any further, without turning clip off. (I remember there used to be a similar issue with the Telvanni Council house in Port Telvannis.)
