You can watch the high speed video of the process here:
on Vimeo: http://vimeo.com/beagonzalez/light-flowerprocess"
On Youtube: http://youtu.be/FW9tn6tU2UE" (coming soon)
This was going to be a speedpainting video, but during the process I decided to extend the worktime... 3 more hours... xDDDD
I have to say that I don't usually work like this on elaborated illustrations. Normally I started with an hand-sketched scanned line art, and adding the colors directly from the beggining, not with grayscale shading. But this was an exception cause like I previously said, It was going to be an speedpainting, and I usually I made the speeds like this.
Just for fun. Around 4:20 hours.