How do painters draw mermaids?

First of all, there is a problem of how to correctly understand the object, that is, the observation method.

One of the basic principles of sketch is to depict the object faithfully. It is not a simple mechanical imitation, but a scientific method to shape objects. To learn to shape objects in a scientific way, we must first learn to observe objects in a scientific way.

People who have not been trained in sketching are always used to observing objects from details, and then look at another part after reading one part. This kind of observation is reflected in the picture and cannot correctly and completely express the overall image of the object.

Experienced painters always observe the object as a whole, focusing on the overall situation, observing the body structure and the relationship between light and shade of the observed object as a whole, rather than looking at it piecemeal from small parts. Only in this way can we accurately grasp the overall image of the object. Therefore, the correct observation method is to form the habit of observing the whole object. This observation is based on a comprehensive study of the complex relationship of objects; By contrast; From the whole to the part, and then to the whole is the basic procedure.