1、打开SU程序,用徒手画笔工具绘制一个简单的等高线,然后根据高度调成空间线
![SU实用技巧:[2]沙盒工具之曲面投射](https://exp-picture.cdn.bcebos.com/e86ba4b842406afef9da4c761eee41c1b6279f61.jpg)
![SU实用技巧:[2]沙盒工具之曲面投射](https://exp-picture.cdn.bcebos.com/07c98f2ca5cadce8d486bd4ffcf7980e5e209561.jpg)
2、利用沙盒的“根据等高线生成”生成坡地(详看另一篇系列经验,SU实用技巧:[1]沙盒工具之根据等高线生成),给一个单色以方便区分
![SU实用技巧:[2]沙盒工具之曲面投射](https://exp-picture.cdn.bcebos.com/3761a73acd8920c569c13586568a59de44078861.jpg)
![SU实用技巧:[2]沙盒工具之曲面投射](https://exp-picture.cdn.bcebos.com/d400248ca608a50fce32ed3f10cec7f88b77ff61.jpg)
3、根据坡地大小,绘制一个简单的山路
![SU实用技巧:[2]沙盒工具之曲面投射](https://exp-picture.cdn.bcebos.com/2e66f9ef28066b01f4138ef33df39187021cf361.jpg)
4、将山路移动到坡地正上方,调至合适位置
![SU实用技巧:[2]沙盒工具之曲面投射](https://exp-picture.cdn.bcebos.com/b7b28f87031c99c0c3325c35af2fa872951fed61.jpg)
5、选中山路,然后点击沙盒的曲面投射工具,
![SU实用技巧:[2]沙盒工具之曲面投射](https://exp-picture.cdn.bcebos.com/256eb672941fbee446144dedc1237971ff1de761.jpg)
![SU实用技巧:[2]沙盒工具之曲面投射](https://exp-picture.cdn.bcebos.com/bfa52adaf05e4a230cbf43ae1dd818196020e261.jpg)
6、此时左下角提示栏会显示:选择你所需要悬置(曲面投射)的栅格(网格),然后用鼠标点击坡地
![SU实用技巧:[2]沙盒工具之曲面投射](https://exp-picture.cdn.bcebos.com/f11f54237971fe1de116a5aaea20a7cd0d6ee061.jpg)
![SU实用技巧:[2]沙盒工具之曲面投射](https://exp-picture.cdn.bcebos.com/ff5c88d818196120dd03b1dd70f202b374d7df61.jpg)
7、投射成功后如下图
![SU实用技巧:[2]沙盒工具之曲面投射](https://exp-picture.cdn.bcebos.com/6061b9cd0c6efbf27f7dc864127bbbf4db58da61.jpg)
8、隐藏或移开山路,选择坡地上投射的山路调整颜色
![SU实用技巧:[2]沙盒工具之曲面投射](https://exp-picture.cdn.bcebos.com/03f26bd7997bbbf45b96cf695549610f8a56d661.jpg)
9、最终效果如下
![SU实用技巧:[2]沙盒工具之曲面投射](https://exp-picture.cdn.bcebos.com/8a17b3042e6817e9d82fb34bd356d53da924ce61.jpg)