How ILM Invented the Software Behind Terminator 2's Liquid-Metal T-1000

In 1991, ILM’s computer graphics department was tiny and pushing against the limits of the hardware it had, yet it delivered the CG that defined Terminator 2: Judgment Day — most famously the shape-shifting ‘liquid metal’ T-1000. This oral history gathers more than a dozen ILM veterans to reconstruct how bespoke tools with names like ‘Make Sticky’ and ‘Body Sock’ were built essentially from scratch, and how the team leaned on early commercial animation packages like Alias while writing much of the frame-by-frame rendering and compositing pipeline themselves in C-shell.

A recurring theme is momentum from The Abyss: its water-tentacle work proved digital effects were viable and gave James Cameron a partner willing to bet on unproven technology, so on T2 there was no analog fallback if the CG failed. The account also captures the department’s build-out — ILM hiring its first ‘software-only’ engineer (Eric Enderton) rather than having shot artists write all the code, and technical directors with CS backgrounds handling the procedural batch processing that only later became standard in off-the-shelf software.

The piece doubles as a snapshot of studio culture at San Rafael: overlapping work with Pixar, transatlantic 2am job interviews, applause in dailies for new hires, and storyboards color-coded by difficulty where the ‘blacks’ were the shots nobody yet knew how to solve. It’s a firsthand look at a foundational moment when hand-built engineering, not off-the-shelf tools, produced some of the most influential visual effects in film history.