Looks great aside from the slight negative space on the right side, you should have a C4D or a background stock in that area to fill the space. Nice work, keep it up
DeviantART link ~
http://mootinie.deviantart.com/#/d4rwk9j
Created in Cinema 4D.
Edited in Adobe Photoshop CS5.
It's 1440x900, so if you have that resolution you're in luck ;)
CnC please? :)
The signature without outline would look better if it was blended more.
You could..
1. Click Eraser Tool. Find a 65px Large Soft Brush. Set Opacity to 10% and slowly erase the edges of the render.
2. Add gradient maps and photo filters to bring out better and matching colours between render and...
I don't quite understand what you are asking but I'll give it a try.
Do you know how to use the layer palette? With that you can move layers around. Also, you can use blending modes to blend things around. Give them a try.