If you are old enough to have watched Toy Story in theaters back in 1995, you may have noticed that the version streaming on Disney+ today doesn’t quite feel the same.

You see, Toy Story was an entirely digital artifact but it had to be distributed to movie theaters using the technology theaters had at the time—35mm film projectors. Therefore, every frame of the movie was recorded onto film

Animation Obsessive explains:

Their system was fairly straightforward. Every frame of Toy Story’s negative was exposed, three times, in front of a CRT screen that displayed the movie. “Since all film and video images are composed of combinations of red, green and blue light, the frame is separated into its discrete red, green and blue elements,” noted the studio. Exposures, filtered through each color, were layered to create each frame.

It reportedly took nine hours to print 30 seconds of Toy Story. But it had to be done: it was the only way to screen the film.

The home video version of the movie was mastered from a 35mm print.

And then in 1999, A Bug’s Life became the very first digital-to-digital home video transfer. Pixar devised a method to go from their computers straight to DVD.

In the early 2000s, Disney/Pixar would redo the home video transfer for Toy Story using the same digital mastering technique. “And it wasn’t quite the same movie that viewers had seen in the ‘90s.”

“The colors are vivid and lifelike, [and] not a hint of grain or artifacts can be found,” raved one reviewer. It was a crisp, blazingly bright, digital image now — totally different from the softness, texture and deep, muted warmth of physical film, on which Toy Story was created to be seen.

And then digital transfers became the standard.