What was the first Disney movie to use CGI?

The Black Cauldron was not the first Disney movie to use CGI. The first Disney movie to incorporate CGI was actually The Great Mouse Detective, released in 1986. Although the animation style in the film was predominantly traditional hand-drawn, CGI was subtly employed in a few scenes, such as the climactic showdown where the characters are seen running and climbing along the gears of Big Ben. Therefore, The Great Mouse Detective holds the distinction of being the first Disney film to include CGI elements, rather than The Black Cauldron.