Waaaay pre-Williams, yo.
In spite of this setback, Miller still had Sturdivant and Citters continue work on "Roger Rabbit." He ordered that live action footage be shot, so that pencil test animation could be layered over these scenes -- to see if a toony Roger Rabbit could convincingly interact with a live action Eddie Valiant.
Early subscribers to the Disney Channel actually got a chance to see this footage on an April 1983 broadcast of "Disney Studio Showcase." Hosted by animation historian John Culhane, this program (which also hyped the then-in-production film "Baby - Secret of the Lost Legend" as well as Tim Burton's TV version of Hansel & Gretel) included a preview of "Who Framed Roger Rabbit."
The test footage featured an unknown actor standing in for Eddie Valiant. After exiting an alley, Eddie is suddenly accosted by a giant cartoon police detective. He's then shown drinking at a bar with an early version of Jessica (Who at this point in her development, wasn't quite so voluptuous. This Jessica -- who was supposed to be the villain in this version of the film -- looked a lot like Cruella De Vil-gone-Hollywood). The segment ends with Culhane exiting the Roger Rabbit production offices, just before a fully animated and painted version of Roger strolled through this live action setting.