What are the key points and skills of portrait sketch? Master's instruction

In the process of sketching, the most common problem for beginners is the accuracy and inaccuracy of depicting objects.

This brings us the fuzziness of sketch. Fuzzy concept refers to concepts that are not clearly defined, such as "bright and dark", "long and short", "big and small" and "virtual and real". The concepts commonly used in these painting languages are all obtained through rough comparison, and there is no absolutely clear boundary between them, so it is impossible to distinguish the differences between these concepts with accurate data. Because of this, the accuracy of sketch is improved with the continuous improvement of the author's understanding ability and skills, which is also the particularity of Su Lao's understanding of accuracy.

So how can we be less vague and more accurate, so as to improve our sketch preparation?

The first is to raise awareness, and then the method should be correct. The improvement of understanding ability should be the improvement of appreciation ability. Always look at the accepted sketches. This good work is also a relatively accurate work. More analysis, more research, a clear understanding of its advantages, more works will naturally enhance their horizons, and their own painting will slowly move closer to good standards.

Comparison is the only correct and effective method in sketch. Only by constantly improving the contrast, finding problems, correcting mistakes and constantly improving, the more detailed and in-depth the work, the more perfect and accurate the picture will be. It is impossible to be absolutely accurate, as long as you reach an accurate level of knowledge.

In the traditional sketch theory, there are very complete application rules about "point" and "line", but for beginners, not all the theories and rules can be skillfully understood and applied. For example, when measuring and determining the proportion of objects, we can judge by intuition or by measuring the distance between line segments with a pencil. Among them, the method of measuring distance with pencil is worth analyzing and discussing. This is a way to compare various line segment lengths of an object (usually with two endpoints). Due to the fuzziness of manual measurement, it is usually only possible to judge the length of the line room, and it is impossible to compare the exact value of the line. In fact, it is difficult to express the proportion of objects on the screen in this way, because in the process of thinking in images, people's understanding of "accurate value" is very limited, and they can only identify and express some regular fuzzy proportions. There are many such examples. Let's discuss some application methods of "point", "line" and "surface" in sketch.

As we all know, a line consists of two endpoints. When drawing a red line by visual means, it is easiest to find out the position of the middle point, which is determined by the characteristics of people's thinking in images. In the process of sketching, there are many relationships that need careful identification and judgment. We might as well use the method of "finding the middle point first" to determine the most basic proportional relationship. For example, when drawing an avatar, we can first determine the position of the eyes after drawing a rough outline, because the position of the eyes is often in the middle of the head (that is, the middle of the up-down relationship); Then it is easier to determine other positions and proportional relationships, which is completely in line with the characteristics of people's thinking in images.

In fact, we can cite many such examples. For example, when depicting the whole plaster bust, we can first determine the position of the upper and lower endpoints, that is, the position of the top of the head and the base. Then, in general, the position of the chin must be the easiest to find and describe, because it is often in the middle. In ancient China, there were a lot of theoretical knowledge about the fixed point and shape of painting, among which "three courts and five eyes" was a classic theory formed by analyzing and summarizing the horizontal and vertical directions in portrait description.

Two basic "lines"

The two basic "lines" refer to the operation of horizontal and vertical lines. Specifically, we can divide all kinds of lines to be processed in sketch into "near vertical" and "near horizontal", that is, we can measure and compare the properties of all kinds of lines close to it with "horizontal" or "vertical" as the scale, so as to grasp the overall relationship of the picture.

When sketching figures, the horizontal and vertical contrast method is generally used to determine the position under the structure and left and right. For example, after the perspective change of the brow bone points, if you can't see clearly with your eyes, you can see it by pointing a horizontal pencil at the object. For example, it is not easy to draw the ears and the back of the head when looking down at the head, but as long as it is measured horizontally, it will be determined that the upper helix will move up between the eyebrow arch and the hairline, and it is not easy to accurately find the position where the earlobe moves up to the cheekbone, but as long as it is measured vertically, it is clear at a glance whether it is on the left side of the nose rather than the right side, on the left side or the right side of the mouth, or on a vertical line. By analogy, every tiny structure of the head can be found by comparing the horizontal and vertical lines. More accurate points can also be found by using the coordinate points where the horizontal and vertical lines intersect.

Various geometric "block surfaces"

"Three sides" refers to various combinations of element geometric comparison methods. The unit geometric comparison method means that the bright surface of the observed object presents similar plane geometry. If the front light receiving surface is rectangular or trapezoidal, what is the geometric area, and then compare the front light receiving surface on the screen. If you draw a rectangle into a square, or a trapezoid into a rectangle, that is to say, the geometry on the screen and the geometry of the object cannot be similar, then it is proved that drawing is wrong. Another example is a face with an acute triangle between the eyebrow arch and the eyes, and then check whether the bright face in the picture is also a triangle and similar to the triangle in the ground image. The dark side is also compared by methods. You can compare the dark side with the dark side.

To sum up, in order to improve the accuracy of sketch, we must observe the case as a whole and combine the methods of "one point", "two lines" and "three sides" and use them flexibly. This will improve the modeling control ability quickly and effectively.

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Will you see dizziness? Hehe ~ ~