Second part
. Once again we click on red markers follow the numbers:
after
direction we seee something lik this:
Then:
Now we must back to the top [to node which direct us earlier], and delete it also.
Now we resave the file.
We deleted one water stream. We must do again all procedure to delete another, or few more water strems. Which water is not necessary? You can see this durning a game. Thats all.
We also always do this for our personal use
.