油菜
![](https://img.haomeiwen.com/i11961834/5c6b64dada96f896.jpg)
先找出油菜的斜度和长度,确定出在画面中的位置
![](https://img.haomeiwen.com/i11961834/9b815d20e2ef5933.jpg)
然后画出底面和侧面
![](https://img.haomeiwen.com/i11961834/b2e2c0ae45a54a32.jpg)
找出底面的中轴线
![](https://img.haomeiwen.com/i11961834/49cd0284795692a7.jpg)
依据四边形画出切面上的椭圆
![](https://img.haomeiwen.com/i11961834/d0e2ce4a499f65aa.jpg)
然后找出根部的大小,画出里面的椭圆
![](https://img.haomeiwen.com/i11961834/8c5c0ba11dde3753.jpg)
加上根部的厚度,画出顶面的椭圆
![](https://img.haomeiwen.com/i11961834/d21c4f101104ffd5.jpg)
画上旁边的叶片
![](https://img.haomeiwen.com/i11961834/74bc27aa18d90073.jpg)
沿着油菜根路的中线,先加上中间的叶子
![](https://img.haomeiwen.com/i11961834/586b95620d6a7616.jpg)
再加上两边的叶子,注意叶子之间的角度
![](https://img.haomeiwen.com/i11961834/ad30114a97ec73c8.jpg)
添加上最后面的叶子
![](https://img.haomeiwen.com/i11961834/ada584f6a8d9f3b5.jpg)
找出阴影和明暗交界线
![](https://img.haomeiwen.com/i11961834/6a005d11a3b3fe9f.jpg)
先把暗部排上一层浅调子
![](https://img.haomeiwen.com/i11961834/00cc0c7f5dde26a4.jpg)
再把暗部的深浅变化区别出来
![](https://img.haomeiwen.com/i11961834/d74eff222616f489.jpg)
用2B把油菜的叶子画一层浅灰调子
![](https://img.haomeiwen.com/i11961834/3c5644986f1191e1.jpg)
然后用3B加重阴影和油菜的根部
![](https://img.haomeiwen.com/i11961834/b18cabf0ca0e8b26.jpg)
找出叶子的肌理
![](https://img.haomeiwen.com/i11961834/6fa50770e4c6a01e.jpg)
从左下方最重的地方加深,注意留出每条肌理的白边
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