What are the skills of sketching? Where should I start? What's so particular about those lines?

For the students who have just started to learn sketch, the lines have no rhythm change, the lines are too tense and rigid, and the lines are completely inflexible. At this time, the main focus is on form. When painting reaches a certain stage, confident painters with certain experience try to summarize it with flexible lines, which are true and false.

Before sketching, we should look at the overall movement trend of the model, so as to know what the dynamic line should be, so as to observe the model and master how to grasp the dynamics of the model to draw. No matter how big the dynamic lines are, no matter how small the fingers are, they are inseparable from the rhythm of sketching. Light and heavy, virtual and real, slow and fast, static and static, etc. These are the rhythms that a painting needs. The lifeless picture gives people a dull feeling and has no ventilation effect. The rhythm of the relationship between black and white is also very important. Whether it is sketching or sketching, the contrast between black, white and gray plays an important role.