In 1990 Harald Siepermann provided visual development for the Amblimation movie We’re Back! A Dinosaur’s Story. An earlier post already showed some of Harald Siepermann’s visual development for the character Professor Screweyes, which he based on the actor Danny DeVito. In addition to Professor Screweyes, Harald also made designs for various dinosaur characters that appear in the movie, among them Rex, Dweeb and Woog (at the time of production called Hatrack).
Below are several of Harald Siepermann’s visual development designs for the character Rex: