(It's not a paintover/retouched photo, i didn't use any photo reference... >> http://img209.imageshack.us/img209/3450/tofowip2sbre6gu.jpg)
This is a still life study realized with the intention of to perfect my "eye" and my perception of the colors/tones/contrasts/etc (it's my first still life study since the ending of my student life). At first i wanted to make an Oil painting, but computer is sometimes more practical.
It takes me a lot of time, however i can't say how many hours.... Photoshop, with the model at the right of my screen.