Gratz has also collaborated with other animators such as Portland, Oregon's Joanna Priestly to produce films that animated 3-D objects on the flat animation table.
ɡɹˈæts hɐz ˈɔːlsoʊ kəlˈæbɚɹˌeɪɾᵻd wɪð ˈʌðɚɹ ˈænɪmˌeɪɾɚz sˈʌtʃ ɐz pˈoːɹtlənd, ˈɔːɹɪɡənz dʒoʊˈænə pɹˈiːstli tə pɹədˈuːs fˈɪlmz ðæt ˈænɪmˌeɪɾᵻd θɹˈiːdˈiː ˈɑːbdʒɛkts ɔnðə flˈæt ˌænɪmˈeɪʃən tˈeɪbəl.