Here is my approach to using artrage.
I used an Internet image of Neo from the matrix.
Also used some other images like a bullet from the net. This give me some ideas as I paint. As I might add bullets some at speed with a small vapour trails.
I cut out the back ground and inserted a image I made in after effects.
So using the ref images I set about drawing the over all image and made changes as I went along.
You can use trace image for a quick mock up giving you a ok image to work with. I not to fond of this as it distracts from drawing. But feels its worth a mention for people just starting out in a drawing program. Artrage is a very intuitive program when combined with a Wacom tablet.