HI rafpug, thanks I'm happy you like :)
Rawalanche - actually I've always use gama correction, but during the post treatment, I confess I carried a little hand to give a more dramatic effect, say.
headoff - Just to push the contrast a little more, Tomorrow I'll show to my clients the job, and I sincerely appreciate your comment and will slightly reduce the contrast. Makes sense :) Thanks aid
Here the render itself without any post