Note: As of version 2.0.0, Unity 4 support for the package has been dropped. To get the latest version of TerraBrush on Unity 4 after buying, please refer the forum thread.

TerraBrush is a terrain painting tool. You can use it to create cliffs, ice caps, beaches just like a procedural generator but you have complete control over the painting.

Features:
1. Terrain Painting based on height, steepness and surface normal of terrain
2. Unity Terrain Engine like interface
3. Support for different types of brushes and custom brushes
4. Can be used as a fast runtime terrain painting solution with slight modifications (refer docs last section or send me an email)
5. Paint vast terrains with ease!
6. Add an artistic flair to your terrains with a realistic look

Watch the demo video here! It is also embedded along with the screen shots.

Forum thread