The hair and makeup department style hair and apply makeup. Basically, your needs from hair and makeup artists depend on the nature of your story. The horror genre generally requires a little more hands on deck, particularly if characters are having their hands severed left and right. After that, action and thrillers can also call for more complicated effects, depending on how many gun shots and stab wounds occur. And if your science fiction film is about a race of extra-terrestrials invading Earth, just say the aliens all have the ability to make themselves look like human beings. After all, this worked out pretty well for David Bowie in “The Man Who Fell to Earth” and Jeff Bridges in “Starman.” For really low budget productions, you might even let the cast handle this on their own, or try to cut a deal with a local salon.
Check out Lili Kaytmaz (@lekmakeup) in this little tutorial: