Although not credited for his work on Rise of the Guardians, he did create several pieces of concept art that were never used in the final film.
- Puss in Boots (2011) - art director
- Kung Fu Panda (2008) - visual development artist
- Shrek 2 (2004) - production illustrator
- The Road to El Dorado (2000) - production designer
- The Prince of Egypt (1998) - visual development
- Balto (1995) - layout artist
For a while Christian worked on the early version of Rise of the Guardians, developing ship designs. Eventually, the ship was written out of the movie, so none of these designs were used in the final film.