View full project progress at my repo.
This is an interesting way to add textures. After doing it the first time, I reverted back and used the small scale across all the skin, then added the two different large scales. That allowed the two different textures to “bump up” against each other without the “soft skin” texture being on the hard scales. I also could not remesh as fine as on the video as it put my blender file above the repo 100mb limit. I may have to stop pushing that up as with each step I get closer and closer to hitting the limit.