So, it all begins with me switching from integrated GPU to my GTX 960m GPU.
If you can notice - there is lines between these blocks at that little hill.
That's when I switched to my GTX GPU but when I have my integrated one, that doesn't happen.
Before - this hasn't been happening to me at all and I am not sure what is the issue.
There is also some kind of green lines in the sea too.
If anyone has any idea how to fix this, please let me know. :)