My editor emailed me this rough sketch drawn by himself. Wow, very cool! :-)
Posing & lighting simulations on "Poser" + "Vue"
1st draft on paper
2nd draft on paper
Merging 2 drafts on "Photoshop"
Painting a background on "Painter"
Making the masks of each figures on "Photoshop"
Painting 1st figure on "Painter"
...to Step 2