There were unused scenes from the original script where Alice manages to hack into the files of Umbrella. It is revealed that her real name is not Alice Abernathy but Janus Prospero. This was previously alluded to in the merchandise for the previous film Resident Evil: Apocalypse (2004), where a fake newspaper clipping was released that contained details on Alice, such as that her family started a search for her after she disappeared, and that Alice was simply her code name.
The film was not screened for critics, most likely due to the overwhelmingly-negative reviews from critics for the first two films.
A conscious decision was made early on to make this the bloodiest of the Resident Evil films.
For the crow attack scene, only two crows were used for the entire sequence. The rest of the crows were entered with special effects.