Am I correct that they don't use a test-train split for generating these distilled images? Until you test on new images outside of what is inputted to the disti

Am I correct that they don't use a test-train split for generating these distilled images? Until you test on new images outside of what is inputted to the distiller, it seems to be a way to just overfit specific images, probably by combining unique elements of each into a single composite image. There are plenty of classical signal processing ways to do this (including just building a composite patchwork quilt).