Raise or Lower Terrain by the Unity Terrain Editor

 Steps of building terrain by the Unity Terrain Editor:


1. Start

GameObject> 3D Object> Terrain

Hierarchy> Terrain

Inspector> Terrain> Raise/Lower Terrain

Use the selected brush to raise terrain in the scene view.

Inspector> Terrain>  Paint Height

Inspector> Terrain>  Settings>  Height>   20

 Brush inner lower area.

Inspector >  Terrain>  Settings>   Height>   50

Brush outer higher area.