Jessup said that the animation team wanted the Land of the Dead "to be a vibrant explosion of color" when Miguel arrives. Jessup also said that "Lee [Unkrich] described a vertical world of towers, contrasting with the flatness of Santa Cecilia. The lights and reflections are dazzling and there's a crazy transportation system that connects it all. The costume colors are much more vibrant than in the Land of the Living, where [the animation team] tried to stay grounded in reality. [They] really went all out in the Land of the Dead to make it a reflection of the holiday". According to David Ryu, the film's supervising technical director, the animation team "ﬁgured out a way to introduce a single light — but give it a million points" for the scenes on the outside in the Land of the Dead: "The renderer sees it as one light, but we see a million lights". According to art director Daniel Arraiga, the animators "had to ﬁgure out how to give [the skeletons] personality without skin, muscles, noses or even lips" and that they "played with shapes and did a lot of paintings. [They] sculpted and studied skulls from every angle to ﬁgure out where [they] could add appeal and charm". Global technology supervisor J.D. Northrup was hired early in the film's production in order to avoid potential issues in the film's animation process. Northrup said that "Each [of the skeletons' pieces] had to be independent so the complexity of the rig and the stress that it puts on the pipeline were something like we've never seen before." Northrup was also tasked with simplifying the skeleton's elements to render the skeleton crowds. In order to create the skeletons, several additional controls were used, as they "needed to move in ways that humans don't," according to character modeling and articulation lead Michael Honse. Honse said that the bones were a particular problem, stating that "there was a lot of back-and-forth with animation to get it right," but found "really cool ways" to move the skeletons. The film's score was composed by Michael Giacchino. Germaine Franco, Adrian Molina, Robert Lopez, and Kristen Anderson-Lopez wrote the songs. Recording for the score began on August 14, 2017. The score was released on November 10, 2017. Originally, the film was meant to be a "break-into-song" musical.