Slopes of a crater can be perfectly controlled by editing curves of the sprite.It is very easy to add interesting details to a crater by smudging, erasing, burning and dodging the sprite.

• 通过编辑元画面的曲率可以完美地控制陨石坑的坡度，而通过对元画面做些手脚，比如模糊，擦除，高亮，遮蔽等，就可以轻易地给陨石坑添加有趣的细节。