For anyone else who happens to find this thread looking for the answer:Yes, do what I said above. If you're looking for how to make archive invalidation work (and haven't yet tried to change anything to that end) just trust MO. Go to the drop down for profiles, click manage, and make sure the automatic archive invalidation is ticked on your profile, then close.If you have already tried other archive invalidation methods (Archive Invalidation Invalidated or Archive Invalidation generator, etc) they're NOT going to work with MO because of how MO hands the files. So delete Fallout.ini, Fallout_Default.ini and FalloutPrefs.ini (from base game and from Documents/My Games/FNV) and go verify your files on Steam. It will reaquire changed files. Then launch the game through the base launcher, set your resolution and options, load to the menu and then exit. At that point, go to MO, check your profile and toggle archive invalidation off then back on. It should now work just fine.If you'd already cleaned your files with FNVedit you will need to do this again now, but at least your textures will work at this point!
StupidFox's post in Intersting graphical error on male corpses was marked as the answer