The Disney film "Rescuers Down Under" was the first 2d animated
film to incorporate CGI. Also it was the first feature film to be completed with
digital software, such as coloring and computer amimation.

Pixar was heavily involved in parts of the movie such as the New York City scene,
where buildings and cars were modeled in 3D. Mcleach's Truck was a huge
achievement in expressing character in 3d animation.

Cel-shading helped to disguise the meshes in the otherwise 2D environment.
The opening scene of Rescuers Down Under uses layers of trees in a
digital environment to create the feeling you are traveling forward; foliage
grows in size as huge buttes on the background increase in size as you get closer.

This summarized the CAPS process that subsequent Disney movies would follow;
computers would facilitate compositing, digital art processes, and camera movement
to speed up production.