Another graphic I created ages ago as a wallpaper and never really did anything with it. I started out with a wallpaper-sized blue background, created a color gradient to a lighter color, ran the ripple filter, warped it about 10 times until the center of the ripple was almost in the top left-hand corner, then made three copies, flipping each until I had four competing centers-of-ripple, then chose the color-burn blend mode for the copies, which for some reason darkened the left side moreso than the right. <img src="https://e.deviantart.net/emoticons/s/shrug.gif" width="15" height="15" alt=":shrug:" title="Shrug" />