Hey!

To achieve realistic facial shading in an image, consider the following steps and techniques:

1. Understand Light and Shadow- learn concepts like form and cast shadows.
2. Observe Real Faces
3. Start with Basic Shapes
4. By Layering and Building up Shadows-Build up shadows gradually by layering darker tones. Start with a light layer and gradually increase the darkness, paying attention to the areas of the face that are recessed or receive less light. Use cross-hatching or other shading techniques to create depth and texture.
5. Study Skin Texture
6. Refine and Blend

https://youtube.com/shorts/B9JtLpz1t9s?feature=share

https://youtu.be/W9pTY2AEUp4

Hope this answered your question 😀