Before special effect artists can bring a creation like a T-Rex to life with robotics and animatronics, they first have to build and sculpt a life-size detailed mockup of the creature out of clay. And while it's probably one of the best jobs on earth, seeing the artists at Stan Winston Studios having to hand-carve every single scale on the Jurassic Park T-Rex somehow makes your own to-do list seem a little less daunting.
Once completed this massive clay T-Rex would have been used to create molds that let the studio cast a flexible skin cover for the dinosaur's animatronic guts. And it most likely gave the effects shop a good idea of what renovations would be needed to the building so they could transport the Rex to the set. We're gonna need a bigger door.