I'd make the render blend better with the background- it stands out too much.. Also, the colouring on the render itself doesnt look right to me.. Like you have put a single colour balance over to try and match it to the background. Try to keep the renders original colour as much as possible so it doesnt end up looking like you have done that. Other than that, its nice. The background I like, and the actual overall colours are nice too
Agreed with all of the above. Blending would be good. Also, try to unify the colors with gradient maps and photofilters that cover the whole sig not just one part. To blend on this one, try using a few overlapping C4Ds and bringing some of those smudged layers to the foreground, eh? ^_^
I didn't have time today to really change it but heres a V2. Changed the smudge layer order and added a bluer color balance
Text needs work placement and font face should be changed.....colors are good, a little more depth could be used but other than that...its a step up