Brushes

When you apply a tool such as Paint Texture or Smooth Height to the Terrain, Unity uses a Brush, which is a ScriptableObject in the Terrain system. The Brush defines the tool’s shape and strength of influence.

Built-in Brushes

Unity comes with a collection of built-in Brushes. They range from simple circles for quickly sketching designs, to more randomized scatter shapes that are good for creating detail and natural-looking features.

Custom Brushes

You can create your own custom Brushes with unique shapes or specific parameters for your needs. For example, use the heightmap Texture of a specific geological feature to define a Brush, then use the Stamp Terrain tool to place that feature on your Terrain.

To create a new Brush, click the New Brush button in the Terrain Inspector window.

After you click New Brush, the Select Texture2D window appears. Choose a Texture to define the shape of your new Brush, then use the Brush Inspector to adjust the Falloff and Radius Scale values.

Alternatively, right-click in the Project window, and choose Create > Brush to create a new Brush. The default Brush shows a simple circle defined by a white Mask Texture, a Falloff curve, and a Radius Scale of 1. Use the Brush Inspector to change these values, or set a Texture to define the shape of the Brush. You can also use the Remap slider and the Invert Remap Range option to further modify the grayscale values of the Brush Texture.

Brush settings

• 2019–10–22 Page amended

• Updated screenshots to match the new UI and added information about new options in the Brush Inspector.