The C4Ds do work alright, but you have a lot of empty space on the right, and the smudging is messy in places. Also, the text needs some work, and you need to create a better focal; it is currently hard to tell what I am currently supposed to look at, and it ends up that I am looking at his side/leg, not quite sure what I am seeing at first.
Thank you, maybe I should dim the light on his leg distracting from the focal. The c4d might be too apparant now as well.. Stock: Spoiler
Your border is messed up, guy. You use GIMP right? You're going to want to change the Delta Value to 1 (as low as it will go) so that your entire border is the same shade of black (or whatever color you're using, but use black). Like so: