The skin color texture of the character material in this tutorial is relatively good, and it is easy to handle. However, there are also many details that need to be carefully processed, such as hair, facial features, etc. The author's introduction is a bit simple, and you still need to explore it yourself.
Original picture
final effect
1. Open the original image material, copy the background layer, and execute: Image > Apply Image. Set the parameters as shown below. After confirmation, use the Neat Image filter to smooth the skin (if you don’t have this filter, you can go online to find related downloads. Manual grinding is also possible).
2. Processing of the eyes: Create a new layer, select brown to draw an eyeball, change the layer blending mode to "Overlay", and then add highlights. On the eyeball overlay layer go to: Filter > Noise > Add Noise, make the value slightly smaller, and then go to: Filter > Blur > Radial Blur. These are common methods for treating eyes. If you don’t understand them well, you can find relevant tutorials to learn them.