Music from the Unrealized Film Script: Dusk at Cubist Castle is the debut studio album by the American band the Olivia Tremor Control, released on August 6, 1996, by Flydaddy Records. It is an eclectic album that encompasses a variety of genres, including indie pop, neo-psychedelia, and psychedelic pop. The first half of the album features songs that are influenced by bands of 1960s and 1970s, such as the Beach Boys and the Beatles. The second half features more experimental songs, including two long instrumental songs influenced by drone music and musique concrète. Dusk at Cubist Castle purports to be the soundtrack to an unfinished film, and the lyrics focus on surrealist imagery.

The Olivia Tremor Control was formed in Athens, Georgia, and the line-up comprised Bill Doss, Will Cullen Hart, Eric Harris, and John Fernandes. Doss and Hart had been writing songs for a studio album as early as 1993, and Dusk at Cubist Castle was recorded at Pet Sounds Studio in Denver, Colorado. Childhood friend Robert Schneider served as the producer, and the recording sessions featured several other musicians, including fellow Elephant 6 (and Neutral Milk Hotel) members Jeff Mangum and Julian Koster.

The first few thousand copies of the album were released with a bonus CD, Explanation II: Instrumental Themes and Dream Sequences. It has been claimed that this album will produce quadraphonic sound when played at the same time as that disc. However, the two discs differ in length by approximately five minutes, rendering this an unlikely intention. The Flydaddy 017 release was reissued as a double album with Explanation II as the second disc. This bonus disc was later re-released as a full album by Flydaddy in 1999 but the most recent Cloud Recordings reissues do not include the extra disc.