This is an interesting thread for me as a huge Pixar fan like myself.

First, I suggest you soften the image just a bit. Toy Story was originally rendered at a resolution of 1536x922, and this lower image size actually hid fuzzy textures that are seen in the 1080p version.

Second, I think I’ve got frames from the letterboxed Laserdisc version since some of the bonus features from that release (I think) made it into the DVD and Blu-ray releases. Here they are:
Image #1
Image #2
Image #3

Third, you can get answers from actual Pixar employees online. Craig Good, who worked for 30 years at the studio since its Lucasfilm division days, frequently answers questions about many topics through the site Quora, including ones about Pixar. I can’t guarantee a reply, but you might get an interesting answer from him. Just don’t be too pushy about it, he doesn’t take too kindly to troll/useless questions.