Landscape Tantrums is a demo album of De-Loused in the Comatorium by the band The Mars Volta. It was released on April 23, 2021, as part of the La Realidad De Los Sueños box set. Because Landscape Tantrums was the first attempt at recording what would become De-Loused in the Comatorium, the tracks differ in various ways from the finished versions. The band recorded the album themselves before enlisting the help of producer Rick Rubin who went on to co-produce their first album along with guitarist Omar Rodríguez-López. The name, Landscape Tantrums, is taken from a lyric in "Cut That City", their first officially released song from Tremulant.