This set has a slightly less noticeable shadow, and a simplified highlight. So in general, they should appear to be more shallow (in a 3D sense of the word) than the previous set, as well as most of my other buttons, in turn making this set easier to customize. The highlight is simply a white fill with a low transparency. File formats included are AI (CS & 8), EPS, and SVG. From what I've heard, Inkscpe users who will be wanting to take advantage of these files via SVG format, might have to do a series of un-grouping before you see some of the reflections. To customize, you will need a vector graphics editor, such as illustrator, or inkscape.