Here is the process I want to share with you if you guys are interested ^^
1. rough sketch, I have done 3 versions and selected the best one that I think it represent the concept of mine.
2. rough color, it is very important as I already present the mood of the image. This process I used so many photo reference to study the lighting and color.
3-5. Just enjoy your time and do the detail as much as you want...For this process, I have spent nearly a week to finish it.
6. I called it finish! ^^
Sorry for my Eng if made you confuse.
I hope this will help you to finish your art and keep painting and sharing!!!