This is a BioShock promotional render created by Plastic Wax for 2K Games.

For the Lil Sister i used my lil cousin as ref, the Big Daddy model was created at Blur by Ian Joyner.

I textured her in Photoshop cs3 and Z Brush 3 and composited the render passes together in cs3.
Final stage was overall colour tweaking in Photoshop and adding my favourite part, the subtle blood pass.