com.unity.terrain-tools 2.0.0-preview Package Notes

Brush Mask Filter Stack and Filters
Added Brush Mask Filter Stack to each tool
New noise type "Strata"
Noise Filter
Noise Editor Window
Wind Erosion bug fixes. Looks great!
TerrainToolbox Material Updates
Can import splatmaps with the Terrain Toolbox
Bug fixing for Terrain Toolbox Gizmo
Terrain visualization utilies in Terrain Toolbox
Improved Paint Texture tool. Now uses brush controllers for size, rotation, etc.
Reorderable Layer List/Palette Assets
Eyedropper feature for Paint Texture Tool that selects the most prominent Terrain Layer in a given area
Fixed Mesh Stamp Tool
Rotation for Mesh Stamp now treats brush rotation and mesh rotation as one transformation
Fixed depth for Mesh Stamp
Moved Mesh to RenderTexture to public API for folks to use in their tools
Ability to generate noise based on input Texture. Noise Filter uses this to pipe the heightmap into the noise generation for another way of doing strata
Options to "Reset" brush settings to defaults added on the Tool foldout headers
Removed AssetDatabase.Refresh from static constructor of NoiseLib
LOTS of bug fixing

com.unity.terrain-tools 2.0.0-preview