This tutorial show as how experimented is master Hyun Jin, he has years if not decades of experience. He can make realistic texture with just tones of the same color to make it look realistic. Something curious is that he used green and mixed with the color. An amateur artist could never use that, because apparently the color doesn't look like green. But a master can see that the green is the color that he need in the pigment to make it look more like the photo.
