Much better! . . . but the lines inside the box don't seem good yet. Here you have the picture I made for you to explain what I'm talking about.
Think. . . which of these boxes look *most* natural? Which one would you pick?
You see, you've made it like in the first box case. Have you ever seen an outline like that in the real world? No! The second box is more, let's say: correct, plausible and realistic. The last, at last, is the most natural. Just take a quick glimpse at your TV or something bricky and glossy and you will see that edges are always 'brighter'. Oh god, forgive my English!