there are several ways to address this issue. The easiest solution is to edit the modded NPC's facegen and change the texture path to the vanilla one. Another option is to disable the specific NPC causing the issue from the _DISTR.ini file. Finally, a custom patch can also be created ...
If we adjust the luminance to be sufficiently bright in dark caves then it might turn out that we overdid it and now it's too bright outside. Can't make it perfect, can we? Actually we can if we take the current cell and daytime into account. This fork of Gamma will decrease ...