I love your render of the waves. How did you do the scum effects?
I'm not sure what you mean by "the scum effects", but I hand-drawn the waves with a brush from Photoshop's default dry media set and erased it into shape. The scattered white foams are just two different layers hand-dabbled 1 pixel dots, both with a bit of Gaussian blur on it, and one of the layers set to about 50% opacity.
You could enter this in this month's Challenge, "Redo an older map"
Thanks for the compliment. I was actually thinking of redoing a different map for August's challenge, because I've actually be wanting to redo that one for a while. I'll start a tread about it when I have a few WIP to show the world.