Materials/Tools: Apple, pencil, eraser, sketch paper, drawing board.

1. Draw the center of the apple first, that is, draw its cross center.

2. Then draw the outline of the apple.

3. Draw a structural line in the middle of the apple. Note that the apple is round, so draw a structural line in the middle like the structural line of a sphere.

4. Then adjust them. Note that the lines from right to left are from heavy to light. Invisible structural lines should be understated.

Artistic features of sketch;

Sketch is a kind of monochrome painting, using charcoal pen, pencil, pen and so on. Used to draw light and dark objects with lines. Monochrome watercolors and monochromatic oil paintings can also be counted as sketches: traditional line drawing and ink painting in China can also be called sketches. Generally speaking, the diversification of sketch refers to pencil drawing and charcoal drawing. Sketch is the basis of all painting, and it is a stage that learning painting art must go through.

Sketch usually uses methods that can leave traces on the plane: such as charcoal pen, pen, brush, ink, paper and so on. Outlines and lines are general terms for sketches. Sketch has a feeling of natural law. Different strokes create different lines, intersecting relationships and rhythms, active and passive surroundings, planes, volumes, tones and textures.

Sketch is a formal artistic creation, which uses monochrome lines to express things in the intuitive world, as well as ideas, concepts, attitudes, feelings, fantasies, symbols and even abstract forms. It does not pay attention to the whole and color like color painting, but to the structure and form.