This is the third shader I have ever made(I made my first one yesterday) so I hope you like it!
It is a less expensive form of Unity parallax, which I developed for terrain .
In this video you can also see a river simulation script that let you paint rivers,lacks of water and sea on your terrain.
In the future(tomorrow), I am hoping to create the Selfish parallax (It will be a parallax shader that would need only one diffuse texture in order to take effect.)