I'm really no expert when it comes to these large piece. But I can offer some advices. I'm not sure why the piece seems to be cut in 2 parts, there's a obvious horizontal line right thru the middle, is there a reason for that? Uhm, IMO the 3rd hokage doesn't blend in quite well, but because you want to imprint it on the sky I really can't offer you any solution. Text wise, it's a bad idea to split it into 3 corners, its a bad idea to put it in the corner in the first place. Try placing the text close to your focus and flow, it'll be much more appealing.
I was working on your sig, but the render you provided has a big problem with it: the entire right side is cut off =\ It's really hard for me to position the render correctly, I guess I can try to cover it up with C4D, but if theres another one that you like please feel free to request!
There already exists a thread similar to the one you posted.
Head here for the answer to your question- http://www.animetake.com/forums/gene...ing-files.html
In the future pls make sure you are not duplicating another existing thread.