What should I pay attention to when sketching?

Posture: the posture should be normal, the hand should be basically straight, and the drawing board should be at right angles to the eye line of sight.

Distance: The sketchpad should be placed perpendicular to the scene, and the distance from the depicted object is generally more than two and a half times its width or height. If you are too far away, you can't see the details of the object clearly, and if you are too close, it will easily be deformed due to perspective.

Grip: Generally, you don't need to write normally when sketching. Generally, you hold a pencil horizontally under the palm of your hand and don't go through the tiger's mouth. The lines drawn are straight and smooth, because the wrist force and elbow force are used, the lines are particularly powerful. Beginners will not get used to this kind of catalpa pen at first, but they will feel natural when they get used to it.

Lines: The lines drawn by pencils vary in length, thickness, light and shade, density and crossing. Generally speaking, long lines are used to draw backgrounds and large objects, and short lines are used to draw foreground and details; Thick lines and thick lines are used for secondary objects and dark parts, and thinner and lighter lines are used for main objects and bright parts. Pencil drawing is often drawn with crossed lines, which is convenient and casual, and must not be crossed. Usually, you should practice more lines, so that the lines are natural and smooth, dense and well-organized, with appropriate depth and distinct layers.

Usage of rubber: Keep the rubber clean when using it, and wipe it clean with cloth or fine sandpaper after use, otherwise it will stain the picture when using it again. The shiny parts of the details in the painting can be erased with rubber tips cut into triangles. Experienced painters will not only use an eraser to correct picture errors, but also use an eraser as a "white pen" to wipe out this light, edge light and so on. Angle selection: Choose an ideal angle when drawing. When you are a beginner, don't choose a completely light-receiving surface that lacks dark expressive force, and don't choose a fully backlit painting that lacks light and three-dimensional sense. Don't sit too low to draw. When the horizon is lower than the surface of the fruit, the painting tends to lack a sense of space.