does anyone know if all the cutscenes in bo3 zombies were made using in game assets like character models and such or are some just cgi rendered?

for cutscenes like shadows and der eisendrache ending scene its kinda easy to tell that its in game cutscenes happening in real time but for cutscenes like The Giant, zetsubou no shima, gorod krovi, and Revelations its hard to tell because the lighting and character models look highly detailed for a 2015 game.