Patron reward - .rovu.

This is practice for depicting the surface of water, which I like. When I first started using my current account, I often drew the surface of water. (I still like it, but I remembered that I don't draw it very often.) I used a few photos as reference, but I didn't re-input any knowledge of water depiction, so I'm not sure if it worked well as practice. For now, I also reviewed how to use layer effects, which I learned recently.