The resting pose in F:NV is noticeably weird, this makes it look normal
So here is the unnecessary bullshit I would recommend.
Now as I understand it, immersion means unnecessary bullshit. For Win 10 subtract 350, for Win 7 subtract 170, for Win 8 use the number it gives VideoMemorySizeMb=Use VRamSizeDX9.exe, to get a 'video memory available' number. The official recommendation is to start at the lowest and incrementally increase until you stop noticing ReservedMemorySizeMb=Lower for older systems, higher for newer.
In your Fallout: New Vegas folder, open your enblocal.ini, and make the following changes Not strictly necessary, but I think an obvious stumbling block that people have with ENB’s is that they haven’t got the settings right for their system Use FiftyTifty's fix for a far more drastic solution, or both (load mine last)
Changes hair mesh flags so that ambient occlusion doesn't shade areas which should be transparent.