I am actually working on a holographic character for personal use. I am creating her using multiple techniques that I have picked up over the years.
Diffuse mapping for her texture
Ambient mapping to add a nice glow effect to her.
Transparency mapping to make parts look like computer code like in Cortana from Halo
No bump mapping on her but I am using displacement mapping to give her cyber skin kind of like Hitomi Robo Geisha
Here are two renders I did a bit a go using Hitomi Robo Geisha and Ami from my friend Fu-minn over at renderosity
Nudity in images
http://www.renderosity.com/mod/gallery/index.php?image_id=2340485&user_id=424381&np;&np;
http://www.renderosity.com/mod/gallery/index.php?image_id=2338843&user_id=424381&np;&np;
http://www.renderosity.com/mod/gallery/index.php?image_id=2335261&user_id=424381&np;&np;
