Elastic's Creative Director Patrick Clair "came up with the idea of making a red world that was revealed by liquid." Simulating the CG liquid, which was meant to be an ambiguous reference to poison and blood that behaved like "something in between liquid chocolate and tar", was difficult, with Clair saying "It's hard to make an algorithm act "insidious"". CG Lead Andrew Romatz elaborated that "Developing the right consistency and behavior of the fluids was definitely a tricky process. Getting the scale to feel right was something that we had to play with quite a bit in simulation and also in lighting and texturing. Patrick wanted the sculptures we were forming to feel like miniatures, so we did a lot of experimenting with scene scale and with camera settings, simulating depth of field to achieve that look." Fluids Lead Miguel A. Salek stated that "Each shot required custom flow maps to be painted on the sculptures, along with small attraction fields and thousands of tiny adjustments to achieve the shapes and behavior Patrick was looking for. In the end I simulated hundreds of tests and thousands of frames of fluids to achieve just the right balance for each shot." Due to time constraints, references to Murdock's boxing history such as a punching bag and boxing ring were cut from the final sequence. The final sequence was animated to a temp track-"an old piece of 90s trip hop"-before John Paesano's music for the sequence was completed.