Builds upon fadingsignal's work in his No More Glowing Mouths mod by making the alpha gradient texture within player/NPC mouths completely transparent, which makes the inside of the mouth much darker. As someone who uses darker lighting mods, I thought I'd share this little tweak I originally made for myself. 

Does not require anything other than the base game.


Installation:
Either manually place "mouthshadowgrad.dds" texture file in "*Installation Directory*/Fallout 4/Data/textures/effects/gradients" or download using a mod manager. If using a mod manager, be sure to let this mod overwrite any other mods that edit mouth textures.









Full credit goes to fadingsignal.