Sketch the avatar, how to open it in black, white and gray, and which points are better.

In sketch portrait painting, the visual relationship between before and after and fiction and fact is well shown. For example, the head portrait is close to the viewer's vision, and the nose of the head portrait should be painted realistically. The black and shadow parts of the five senses are heavier, and the virtual parts, such as the front ears, are gray, indicating virtual performance.

The part of the head sketch that needs to be pasted is the bone structure of the face. This emphasizes the bone points, relaxes the imaginary part of the picture, and the overall feeling opens up the black and white gray of the picture, showing a very three-dimensional head sketch.