He, along with actor Pilou Asbaek spoke to CinemaBlend’s own Eric Eisenberg recently and spoke about his “selfish” decision to use more practical effects, because it made his job easier capturing performances while also keeping the movie grounded, to a degree.
However, while one might assume that such effects were used potentially excessively in order to create the Nazi zombie’s of Overlord, it turns out that whenever possible, director Julius Avery used practical effects and prosthetics.
Thanks to the progression of computer-aided digital effects, there’s essentially nothing that you can’t create in the movies today.