This static class provides events that Unity triggers when Terrain data changes.
| heightmapChanged | This event is triggered after there are changes to Terrain height data. |
| textureChanged | This event is triggered after there are changes to Terrain textures. |
| HeightmapChangedCallback | Use this delegate type with heightmapChanged to monitor all changes to the Terrain heightmap. |
| TextureChangedCallback | Use this delegate type with textureChanged to monitor all the changes to Terrain textures. |