Why is it still not possible to generate water in the editor?
The only way to get water on the whole map is the generate button, but it also generates islands which I don't want. I want to create my own islands and have them in the ocean. This is not possible. About 11 months later in development and there is still no such feature. I wrote a thread about it sometime after the release on your steam forum.
The second way to get water is to use the terrain sculpt...