Creating random islands in "water" parallel to the shore?

[bigyihsuan]

@WFab

Create your middle patch of the terrain manually. First sketch out your island shape exactly where it’s supposed to be using “shapes” node. Then you can separately create and erode that terrain, then combine the two after you’ve done water simulation.

I ended up using a Shapes node after creating the river:

I guess you could make barrier islands and island chains with this method too.