Geometry Painter

Geometry painter is used when you want to further polishing terrain geometry by hand, or for someone who want to stick with the traditional sculpting method. Enable Geometry painter by click on the Geometry tab in the Inspector or press F3.
Currently there are 4 painting mode available, you can select using the Mode property under General foldout, or press Tab when focus on the Scene View. These painting mode are:
• Elevation: Raise, lower or smooth geometry.
• Height Sampling: Set terrain height to a pre-sampled position.
• Flatten: Gradually adjust terrain to a desired height, depends on the position when you press the mouse button down.
• Ramp: Useful for making a ramp or slope, the start point and end point are determined when you press and release the mouse button.
The Geometry painter also comes with a collection of built-in brushes, available under the Gallery foldout, click to select one of them. Each brush contains a several settings, as listed under the Selected Brush foldout:
• Id: Id of the brush, click on the label to ping the asset in Project window.
• Collection: Brushes are grouped in the Gallery using its collection name, you can’t change this value unless selecting the brush asset in the Project window.
• Radius: Brush radius in world space.
• Strength: A multiplier to use when perform height map adjustment.
• Texture: A grayscale texture to determine brush shape, this texture must have its Read/Write Enabled option checked in its importer.
You can erase painted data using the Erase All button under Data foldout, this action will NOT affect procedural generated geometry.