The thing does shading correction on the floor surface in the dining area (fireplace fun) and some stretchy shading in the players rent-a-room.
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Author notes
i think the mesh might actually be from UOP, but i compare with extracted nif from mesh.bsa and find so differences beyond my face shading change
File credits
uhh someone im sure, the devmem who made this lovely interior?
Donation Points system
This mod is not opted-in to receive Donation Points
Tldr applied Face Normals in NifSkope, seems to work well with no noticable sufferage :)