Prosthetics for movies

As seen with the Oscar-winning film "The Darkest Hour", makeup and prosthetics enable actors to fully look the part of the role they're playing. Makeup casters use a process called lifecasting. They'll cover the actor in "goop" to create an exact replica, with which they use to build prosthetics to wear. A lot of movies rely on CGI to bring movies to life, but when it can be done, prosthetics truly do enhance the realism of a film.