So its just a little annoyance and doesnt happen often but in certain INDOOR locations my character will start to disappear like maybe in one spot or angle it will be head and arms but if i move a little the whole body will go and i move some more and it might come back or might be able to see the body again. I can move my camera to change what is seen or move my character. This seems to only happen indoors though and again it does not happen everywhere and barely happens at all but I would just like to know if anyone knows something about this. I took some screen shots to help paint a picture.

Screenshots:

Something happened with the second Screenshot and it got cut off but basically all you could see were the legs everything else was gone.

If you are using an enb look for "FixTransparencyBugs" in the enblocal.ini. Set it to false if its on true. Perhaps this is the reason.
Leave it on true causes to my character transparent issues. Some things on him goes invisible.

Yeah I am having the same problem too. In certain interior locations I'm also disappearing. The locations of where they are happening are in Camp McCarran Building by Curtis' office and the Science Room, Kings School in Freeside in the Hallways that go upstairs, Parts of the Hidden Valley Brotherhood Bunker around Eldar McNamara's room in a hallway with rooms and Parts of Gomorrah in the Suites. These are the only places I've really only experienced turning invisible. It would really help for a solution because the turning invisible part is really ruining immersion and experience.

Since I also use ENB, they claim ENB is responsible and that the only response I get is turn off TransparencyFix as well as AmbientOcculsion but to no anvil it doesn't work. Really I am desperate for a solution and I would honestly be thankful for any solution.

EDIT: I found a solution uninstall and reinstall the Game! IT WORKED!