Computer Graphics World

April-May-June 2025

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o c t o b e r • n o v e m b e r • d e c e m b e r 2 0 2 2 c g w 7 I dentical twins Elijah "Smoke" and Elias "Stack" Moore (both played by Michael B. Jordan) face off against an ancient evil in Sinners, a new horror feature from writer/director Ryan Coogler. Set in 1932, this genre-bending film follows the pair of charm- ingly entrepreneurial brothers as they leave their troubled life in Chi- cago behind to open a juke joint in their Mississippi hometown. Smoke and Stack recruit friends and family to make their dream a reality—including their cousin, Sammie (Miles Caton), an aspiring musician who unknowingly summons spirits of the past and future with his revelatory blues prowess. The joint's successful launch night is thrown into turmoil when a bloodthirsty vampire known as Rem- mick (Jack O'Connell) is drawn to the otherworldly music and arrives at the front door. Captured in large-format IMAX 65mm and Ultra Panavision 70 by director of photography Autumn Durald Arkapaw, Sinners is a cine- matic spectacle from start to finish. The film has continued to draw large audiences to theaters, becoming a runaway box office success. I had the opportunity to watch a 70mm screening at the historic Grand Lake Theatre in Oakland, Coogler's hometown. VFX supervisor Michael Ralla and VFX producer James Alexander played a vital role in craing the film's captivating visuals—a project that required massive amounts of collaboration across departments throughout production and post. From groundbreaking "twinning" effects for the leads to a transcendent musical sequence that con- jures ancestral spirits and sets the roof on fire in a dazzling blaze, the team seamlessly merged digital effects into Arkapaw's large-format film photography. Here, Ralla and Alexander share an inside look at the process of bringing this thrilling story to life on screen. How did you become a part of the project? Michael Ralla (VFX Supervisor): I worked with Ryan [Coogler] on Wakanda Forever. Geoffrey Baumann was the main supervisor on that. He brought me on board as the second unit VFX supervisor, and then later on as the associate VFX supervisor through post pro- duction. Geoffrey ended up directing an underwater unit for 30 days, and I filled in for him on main unit for principal photography, which led to spending a lot of days with Ryan on set. During that time, I got to know cinematographer Autumn Durald Arkapaw fairly well. She's very demanding visually, and on previous projects, she wasn't always happy with the visual effects work. To her it felt as if VFX people did not understand her lenses and her photo- graphic style, especially in regards to lighting. We made a major effort to study and replicate those lenses digitally, and to truly understand her way of lighting. We stayed in touch throughout, all the way to final delivery. In January 2024, she texted me and said, "Ryan's doing his next film and asked me to explore large-format photography—and he'll likely be looking for a VFX supervisor next." James [Alexander] and I immediately started preparing for that: We researched the state of the art in terms of face replacements and face swap technology, and were making the rounds around town to look at different options and visit different companies—but the large-format aspect needed spe- cial consideration. Ryan's producer, Rebecca Cho, called me and asked, "Do you want to hop on a call with Ryan and his producing partners, Zinzi [Coogler] Ryan Coogler & Zinzi Coogler at Oakland's Grand Lake Theatre.

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