Tools: white paper, pencil, eraser.

1, the center line is the most critical reference line when describing symmetrical things, so when describing cylindrical things, we usually draw the center line first, then the lines on both sides, locate the width, and then draw the width.

2. The general form of glass is to connect first, and the upper and lower arcs are almost parallel.

Draw the main cup first, then the lemon slices and ice cubes, so that you can be more sure.

4. When you draw the outline carefully, you must also draw the details such as the cup mouth, so as not to lose the in-depth time in the future.

5. When drawing the initial light and shade, basically ignore its texture and light, squint at the general light and shade, and determine the position of the dividing line between light and shade. You can start drawing, but be careful not to draw too much.

6. Further deepen and pay attention to the ice in the cup, but if you describe it in detail at this time, it is easy to draw some heavy places. This can be avoided by using large lines.

7. Don't rush to refine and adjust the whole relationship between black, white and gray.

8. Starting from the most interesting places, I usually choose the main things, the places closest to the observer, because these places need special details, such as the cup mouth in the picture, and pay attention to keeping strong highlights. Displays the texture of the glass.

9. When drawing a cup, deepen the boundary between light and dark, and keep the ice in the cup light. You can also use a plastic eraser.

10, the ice exposed from the cup mouth can be prevented from becoming heavy in color with a lighter stroke of 2 hours.

1 1 Finally, refine to make the colors of lemon and soil sweet.