Towards the end of Raiders of the Lost Ark, the first movie in the Indiana Jones series, viewers are treated to the unforgettable face melt scene, killing the two main Nazi villains. This was an effect that was impressively achieved without CGI. Industrial Light & Magic (ILM) was the team behind the effect, and the visual effects masters have spoken about how they did it in great detail. Steven Spielberg's Raiders of the Lost Ark is the classic 1981 adventure film that follows archeologist Indiana Jones (Harrison Ford) in his pursuit of the Ark of the Covenant, a treasure chest of Biblical artifacts.
https://screenrant.com/indiana-jones-raiders-lost-ark-face-melt-no-cgi/