 The films special effects were not done by ILM because the members  of ILM were already working on _Ghostbusters II (1989)_ (qv) and  _Indiana Jones and the Last Crusade (1989)_ (qv). This hindered the  films ending greatly because the ending was to be much longer than  Kirk simply being chased by "God." However, the sequence had to be  cut out as a result of awful