The Terrain Tools package adds additional Terrain sculpting brushes and tools to Unity. This add-on toolset is suitable if you require more control over the appearance of your Terrain, and want to streamline Terrain workflows. It’s also useful when you want to make more complex-looking Terrain, or author Terrain Texture data in external digital content creation tools.
Package version 4.0.3 is released for Unity Editor version 2021.3.
These package versions are available in Unity version 2021.3: