Ok, 3 hours of post production and here is my final image.
I composited all my layers together, colorcorrection , added depth of field and a bit of blur and grain.
It's time to make final conclusions: it has been very hard. Very very hard: it's my first 3d portrait, and I known nothing about before starting this one. So I'm quite satisfied with the result, even if I know it's far from perfection. Never be fully satisfied, they say
Hope you all will like it too anyway

I did my best!
I want to thank everyone who helped me reading my thread and making comment and giving me precious advice, but even those great guys out there who wrote the several tutorials I read and that teached me te base of how to make this or that. But first of all I want to thank very much my girlfriend who really really helped me a lot during this work!
Thank you very much
Well, stop talking now
All the best to everybody, and thank you cgarena.com for this great contest!!