Poser
POSER is a software program for creating three dimensional models of the human body. You start with a naked body shape (male, female, adult, child) and then you manipulate the pose by adjusting every joint in the body.
You can add skin tones, hair etc as well as a wide range of clothes that are "skinned" to the body so they move as the model moves.
If you are so inclined you can even animate the models.
I haven't seen many Vampirella's created in Poser, but some I have found are shown here.
The image on the left and the animated model below is by Dave Hill.
You will need QuickTime (or similar) to view the animation below (4.2 Mb .mov file).
I can sit and watch this all day...