如此多的管道！
借助这幅简单的素描，我们在七年级课堂中实践了明度、阴影原理以及空间表现。学生们先用尺子在画纸上画出管道轮廓，并叠加绘制了四层管道，其中部分管道在转角处配有连接接头。用黑色记号笔勾勒完线条后，我们用油画棒为管道上色，并假定光源来自左侧；由此，在每根管道上都通过多种颜色的渐变排线，构建出一套明度阶调。
油画棒便于实现色彩间的自然晕染，因而明暗对比效果极为逼真。最后，我们用黑色蛋彩颜料将画面空白背景涂满，以凸显色彩的明亮感与形体的三维效果。
所需材料：
– 画纸
– 铅笔、橡皮和尺子
– 油画棒
– 黑色颜料及画笔
So many pipes!
With this simple drawing we put into practice the value, the theory of the shadows, and the representation of space in classes of seventh grade. The tubes are drawn with a ruler on the drawing pad. We have superimposed 4 levels of pipes, some with connecting joints on the corners. After drawing the lines with a black marker, we have colored the pipes with oil pastels, imagining a light source coming from the left. In this way on every pipe we created a value scale shaded with gradations of various colors.
The oil pastels allow the blending of one color into another and the chiaroscuro effect is very realistic. Finally we painted white space background with black tempera, to bring out the brilliance of the colors and the three dimensional effect of the shapes.
We need:
– drawing sheet
– pencil, rubber and ruler
– oil pastels
– black paint and paintbrush
