Bring out the render more, smudge the sides to blend it in and get rid of the dark line, add some c4d's or fractles on a burn or multiply setting to give it a lil less blinding effects and more dark spots and not too bad for a first.
To be honest, I have no idea what it is. the test needs to be made more visible, or at least readable. I recommend that you watch some tutorials, so you get the jist of where to ut renders ect, as well as learning some useful effects.