| terrain | 激活的地形对象。 |
| editContext | 用于在编辑器和画笔工具之间进行通信的接口。 |
Contains the IMGUI code for custom settings beyond the common settings.
If TerrainPaintToolWithOverlaysBase.HasToolSettings returns true, then there is custom code in this function. If not, then there is no custom code in this function.