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They start with Ninja Turtles animation. Pablo Helman, a visual-effects supervisor who worked on the Star Wars prequels, appears onscreen and shows Bay the latest version of Krang, a new-to-the-movies villain who is, essentially, a disembodied brain inside a giant robot. “So we’ve eliminated the tentacles,” Helman explains. “Is it too monster-ish?”

“He could have some tentacles,” says Bay. “I just don’t want them coming out of the side. He looks like a stupid octopus.”

They show him a clip of two other new characters, a mutant warthog and a mutant rhinoceros named Bebop and Rocksteady. “You gotta adjust that mass,” Bay says. “That mass is not too good yet.” He watches a few more times. “Is our rhino dude’s head big enough, do you think?”

“We could make it bigger,” Helman says. The ILM guys write it down.

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