A bit of a necro, but I had this same problem when after playing Fallout 3 for quite a time, I tried the TTW version. Now I could see every type of body, M or F,was ugly, striped, dirty. It was likewise when playing regular FNV, an installation of a year or so back which then had no such issues. To keep it short, after many hours and trials, I tried uninstalling my recently upgraded FNV MO version and went back to the 1.2.18. I then merely fired up FNV to find that now everything had come back as it should be. Oblivion, FO3, , and Skyrim work well with the late versions of MO. However it seems FNV does not like the later archive invalidation.(?)