Tree Editor（树编辑器）

Unity 提供名称为 Tree Editor 的工具用于在编辑器内直接设计树。对于创建具有不同树类型和变体的高度细节化森林和丛林非常有用。

This section of the manual explains how to use the Tree Editor.

From Unity 5, you can use SpeedTree Modeler from IDV, Inc. to create trees with advanced visual effects such as smooth LOD transition, fast billboarding and natural wind animation. See here for more information.