I've started this picture under the influence of latest Masamune Shirow "softcore" works... My intention was to create a very complex illustration, with a lot of stuff inside. And this is what happens when you don't have everything clear in mind (with the backdrop too...): you begin to paint, and then, when you get to the part you didn't planned (backdrop), you get bored and mess up everything just to fill the paint. Hugh!
Lesson learned: have everything really clear in mind before begin to work... CG is a very dangerous weapon, it allows you to plan everything partially and mix stuff later, but this is NOT the right way of working... :(