Incredible visual effects for 1937. In "Sh! The Octopus," the actress had her features enhanced with makeup using a single color shade, exaggerating highlights and shadows, including her teeth. When a matching color filter is applied during filming, the makeup appears invisible to the camera. Remove the filter, and the makeup becomes distinctly visible. Additionally, this ingenious technique, credited to cinematographer Karl Struss, can also be concealed using similarly colored lighting.
