Sketch is the main learning method of sketch. As an independent art category, sketch has its unique artistic value. Of course, there are not many specialized sketch artists, most of whom are part-time. For example, a few sketches of a master are already very valuable, so you don't have to distinguish between basic sketches and independent works of art, even if these sketches seem to be several strokes, the skill behind them is also very good. Sometimes a random undulating line reflects the artist's profound understanding and mastery of modeling, structure, characteristics, rhythm, charm and art history. This paper mainly introduces three elements of sketch expression.

Three elements of sketch performance

Sketch refers to a form of expression that is objectively described by directly comparing real objects with real scenes. Sketch is a painting method that uses monochrome tools to describe the "three-dimensional" space of objective objects on "two-dimensional" plane drawing paper. The three elements of sketch expression are: form, color and space.

Form refers to the proportional form of an object.

Color refers to the light and dark form of an object.

Space refers to the perspective form and parallax effect of objects.

The directness and objectivity of sketch highlight the observation function of sketch learning, provide conditions for understanding the objective form and changing law of objects, and enable learners to find ways to grasp the essential expression form in a large number of perceptual experiences.

Sketch itself is a practical process. Through operation, on the one hand, learners can record the observation and understanding results of objective things, on the other hand, they can express their attitude towards objective things, from which they can obtain training and promotion of modeling ability.