<P> Toby Kebbell, who portrayed Koba in Dawn, had expressed interest in reprising his role or performing as other characters . Plans to include Koba in a larger role in the film were abandoned early, with Bomback saying, "If you stayed until the very end of Dawn of the Planet of the Apes, you hear Koba's breathing . We did that to give us a tiny crack of a possibility that we could revive Koba if we wanted to . Very early on in spitballing, we realized there was nothing more to do with Koba--certainly nothing that would exceed what he had done in the last story . But we knew we wanted to keep him alive as an idea . In playing out the reality of what happened at the end of the last film, Caesar would be traumatized by having to kill his brother . That would have resonance, and we wanted to make sure that didn't get lost . So the answer was that we could go inside Caesar's mind at this point and revisit Koba that way ." </P> <P> In August 2015, Deadline reported that Gabriel Chavarria had been cast as one of the humans in the film . In September 2015, The Hollywood Reporter announced that Woody Harrelson had been cast as the film's antagonist, and that Chavarria's role was supporting . In October 2015, TheWrap reported that Steve Zahn was cast as a new ape in the film . It was also announced that actress Amiah Miller was cast as one of the film's humans, with Judy Greer and Karin Konoval reprising their roles as Cornelia and Maurice, while Aleks Paunovic and Sara Canning were cast as new apes . </P> <P> Principal photography on the film began on October 14, 2015 in the Lower Mainland in Vancouver, under the working title Hidden Fortress . Filming was expected to take place there until early March 2016 . Parts of the film were expected to shoot for up to five days in the Kananaskis in late January and early February . In March, Serkis confirmed that he had finished shooting his portions . </P> <P> As with Rise and Dawn, the visual effects for War were created by Weta Digital; the apes were created with a mixture of motion - capture and CGI key - frame animation, as they were performed in motion - capture technology and animated in CGI . </P>

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