pˈɪkɪŋ ˌʌp ðə mˈɑːdəl ˌænɪmˈeɪʃən bɐtˈɑːn fɹʌm oʊbɹˈaɪən, ænd ɹᵻfˈaɪnɪŋ ðə pɹˈɑːsɛs fˈɜːðɚ, ˌɪntɹədˈuːsɪŋ kˈʌlɚ ænd smˈuːðɚɹ ˌænɪmˈeɪʃən, wʌz hɪz pɹˈoʊɾəʒˌeɪ, ɹˈeɪ hˈæɹɪhˌɔːsən.
Picking up the model animation baton from O'Brien, and refining the process further, introducing color and smoother animation, was his protégé, Ray Harryhausen.