So I made a coastline in photoshop and then used that file in Wilbur to generate create a height map. I'm currently trying to isolate the rivers so I can delete them from the overall land mass to show the ocean color underneath.

I've tried using different adjustment layers to isolate the darker colors but it isn't giving me the results I'm looking for. Does anyone have any idea what I could do? Or maybe another way to accomplish what I am trying to do. Thanks!

wilbur2upload.png