Here is a frame of a test animation for a Michael Reddford / AngelsDevilsGhost video.
It contains a vectored art character over an animated bitmap sky background.
The original drawing was done on a 3 inch post-it note with ball point pen, which was then scanned in at 600 dpi, and the vectored version hand (mouse) drawn over the top. Seven layers were used to facilitate animating the character, so the hair, scarf and cloak all move to simulate the wind blowing, and the mouth was animated for normal speech as well as the evil, fanged grin.
The sky backgroung has three layers of moving clouds, as well as the moon and a tranparant layer of "parchment" to give it a slight sepia tone. This is one of my first published samples that show how the finished Michael Reddford music videos will look.