Interview: Why Ex Machina’s visual effects will stun you in their simplicity

Interview: Why Ex Machina's visual effects will stun you in their simplicity

This isn't Star Wars

With Oscars weekend upon us, we have the nominated flicks on our minds, and one standout film in particular. No, it's not The Revenant.

Ex Machina, an independent film with a small cast, is up for the Academy Award for Best Visual Effects. It's going up against big blockbusters Star Wars: The Force Awakens, The Martian, Mad Max: Fury Road and The Revenant, though it stands as good a chance as any of winning.

To discuss its stunning visual effects, whether we should be scared of artificial intelligence (AI) and the role virtual reality already plays in storytelling, I chatted with Ex Machina's visual effects (VFX) supervisor, Andrew Whitehurst, who may take the stage on Sunday night with his fellow nominees Mark Ardington, Sara Bennett and Paul Norris.

Whitehurst, who's worked on big-scale films, like Troy, Charlie and the Chocolate Factory, and Harry Potter and the Order of the Phoenix, believes that, even as VFX has matured over the last decade to be a fundamental part of production rather than an afterthought, the industry is being pulled in two directions.

"The blockbusters continue to get bigger and brasher, and people love them for it. So, massive films, with huge crews and stellar budgets, will continue for the foreseeable future. I think that's widely appreciated, though," he says. "What perhaps many cinema goers don't notice is that more lower budget, less spectacle-heavy films are making much greater use of VFX."

Films like Ex Machina. By most accounts, the film stands apart when compared to the other VFX nominees. It's smaller in scale than Star Wars: The Force Awakens and The Revenant, and quieter than Mad Max: Fury Road, or even The Martian. It's visual effects, though stunning, aren't delivered as heart-pounding spectacles.

Ex Machina Ava reflections

"I found it interesting when seeing the showreels cut together to promote the [Academy] awards that they don't really know what to do with Ex Machina, because it has no wham-bam moments that work well in a quick cut reel," Whitehurst says.

"Ex Machina's power comes from the long shots and the tension built up by the pace of the editing. It's unusual for VFX to be used in that context, and it was very challenging, as there's nowhere to hide, but when viewed as a whole it packs a real punch."

A different type of challenge

Directed by Alex Garland, the film, which is also nominated for Best Original Screenplay, follows Caleb Smith (Domhnall Gleeson), who's invited by his employer, eccentric billionaire Nathan Bateman (Oscar Isaac), to administer the Turing test to a humanoid android with AI named Ava (Alicia Vikander).

Ex Machina basically consists of little more than four characters, featuring long, still moments of conversations, typically between no more than two characters at a time.

Whitehurst reveals that the biggest challenge for his team at VFX firm Double Negative was turning an actress into an android and copying Vikander's subtle movements to create her character's robotic elements.

Ex Machina Ava VFX comparison

"Alicia, who trained as a dancer, is extraordinarily graceful and elegant in her movement, and sometimes Ava doesn't seem to be moving at all, just standing, talking with Caleb," he explains.

"You might imagine that this would be easy to copy, but it turns out that no one is ever truly standing still: there are always tiny, subtle movements, and it's these that are especially hard to copy because they are so delicate."

The shots were also longer than usual, Whitehurst says, at least by modern movie standards – at around eight seconds, adding to the complexity.

"Most of the work in the film you know has to be an effect, but I think the extent of the work sometimes passes people by," Whitehurst says.

He points to the scene wherein Ava dresses herself. It required the VFX team to not only create the parts that made up Ava's body, but also add CG clothing that could be seen through sections of the robotic limbs.

"We had to create the inside of her stockings and dress," he says, "and animate them to perfectly match the photographed real clothing."

Image credit: Double Negative

Green screens, AI and storytelling with VR

Perhaps surprisingly for a film that tells the story of a robot with a human appearance, one that required a lot of continuous VFX presence whenever Ava was featured on screen, Ex Machina was shot without ever using a green screen.

"The practical reason was that, because Ex Machina was shot in such a short period of time (six weeks), we were shooting between 15 and 25 set-ups every day," Whitehurst says.

Lighting a green screen would take time, which they didn't have the luxury of.

"Secondly, because the film is made up of intimate scenes of dialogue between the characters, it was of the utmost importance that everyone on set could get into a groove, and it is my experience that as soon as you put a green screen up, everyone starts behaving a bit oddly. They just have this effect on cast and crew, so [to] keep the mood on set, we did away with green screen."

Looking at the VFX work in films made by his fellow nominees in the same category, Whitehurst says Mad Max blew his mind.

"It was such a glorious pop-art kinetic extravaganza. I felt like I'd been punched in the face solidly for two hours, and I loved it."

"VFX that make me feel something are what excite me most, and I left the cinema after Mad Max on a total high," he continues. "It was terrific."

Having worked on Ex Machina, with so much of his focus on Ava, who (spoiler alert) turns against her creator and cruelly abandons Smith, we had to ask Whitehurst his thoughts on whether we should worry about a future filled with AI.

Ex Machina android face-off

"Perhaps, in as much as we should have a concern about any entity with intelligence and agency," he replies. "I am far more worried about human intelligence though, or rather the lack of it. I think people are far more dangerous than machines."

However, in terms of technologies being developed for storytelling, he's excited for the possibilities of VR.

"VR is a medium that we, as a culture, don't really understand yet. We don't know how, or even if, it should be a storytelling medium," he says.

"The first time you try VR that works and you get the sense of presence, of being somewhere other than your physical location, is tremendously powerful. To me, this is the most exciting area of technology-driven visual art."










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