Night on Bald Mountain, Walt Disney’s animated rendition of Modest Musorgskij’s Ivanova noč’ na Lysoj gore, follows the structure of the work, linking the main theme to the demonic figure of Černobog and introducing new ghostly or monstrous creatures for each new musical section.
The climactic orgy includes all of the previously introduced characters as well as newly introduced ones, often depicted in an expressionist style that contrasts with Musorgskij’s own realist aesthetic—indeed, expressionism was an overt rebellion against realism’s Romantic ideals.
Disney’s version also follows the program of Musorgskij’s work as the village church bells put a stop to the hellish festivities, but a happy ending was deemed necessary, resulting in an unfortunate segue into an inappropriately Romanticized arrangement of Schubert’s Ave Maria.
This according to “Klasična glazba u crtanom filmu <Fantazija> (1940.) Walta Disneya” by Irena Paulus (Arti musices: Hrvatski muzikološki zbornik XXVIII/1–2  pp. 115–27).
Today is Musorgskij’s 180th birthday! Below, the full segment from Disney’s Fantasia.
In 2015 Hal Leonard launched the series Disney music legacy libraries with Walt Disney’s “Snow White and the seven dwarfs”, a bound, glossy facsimile of the master score for the 1937 animated film Snow White and the seven dwarfs.
This 200-page MS guided the construction of the film’s final mix of music, dialogue, and sound effects—in effect, it represents the entire soundtrack of the world’s first full-length animated feature film.
Unlike many film studios, Disney has always saved its written and recorded music assets. Over almost 90 years, dating back to the earliest Mickey Mouse shorts and Silly symphonies, millions of pages of music have been preserved, most recently in climate-controlled conditions. Over a million of these documents have now been digitized, streamlining the time needed to find one from two weeks to three minutes.
Above, a two-page spread from the book (click to enlarge); below, the related sequence from the final film. More about the book series is here.
Although Stravinsky’s transplantation to the glamour-conscious culture of Los Angeles may have seemed completely out of character, he genuinely thrived there. Still, his inability to relinquish control made it impossible for him to work as a film composer, despite his efforts to break into the business.
The notable exceptions are his associations with Walt Disney, who used excerpts from the composer’s works for several films—most notably Le sacre du Printemps for Fantasia—before they had a falling-out over financial arrangements.
This according to “The would-be Hollywood composer: Stravinsky, the literati, and the dream factory” by Charles M. Joseph, an essay included in Stravinsky inside out (New Haven: Yale University Press, 2001, pp. 100–131). Below, the Rite of spring segment in its entirety.