the first step is to be clear about the big backlight awareness, and not to be affected by too many changes in hair.

step 2: shape reduction, and the change of the inside and outside contour shapes by backlight should be clear.

the third step is to rub the relationship between light and shade, and pay attention to the hierarchical relationship of hair while rubbing, and the dark side should be adjusted.

the fourth step, the characterization is completed, and the changes of highlights and gray levels should be rich.