There's not really much to it. The brushes used are in the picture, but for the bright blue parts of the water, he used a luminosity layer. Airbrush for the bottom light rays, and use the water brush for the lighter parts on top. To blend, use the blur brush. I'm using the tutorial on a drawing I'm working on at this very moment, and this tutorial has proven to be helpful. It'll be harder if you don't have any knowledge about the program and so-forth. I hope I helped you in some way.
Ahh, this really does look 'simple & easy' (and I think I'll probably draw this crappy at first) but I'll definitely use this later on!~ I really like how it's not overly complicated, but simple to follow along~~
I would love to try these out, but the lack of words explaining how to actually do the steps make this extremely confusing. I mean, how do I actually get to the next step? What brushes and settings do I use? It's really hard to figure out. Which is disappointing, because the results are very pretty and well done.