| terrain | The Terrain object that references a changed TerrainData asset. | 
| textureName | The name of the texture that changed. | 
| texelRegion | The region of the Terrain texture that changed, in texel coordinates. | 
| synched | Indicates whether the changes were fully synchronized back to CPU memory. | 
Use this delegate type with textureChanged to monitor all the changes to Terrain textures.