Rennie has published numerous short stories in several acclaimed anthologies and magazines, including the New Weird anthology, Weird Tales magazine, Electric Velocipede, Mythic Delirium and Shadowed Realms.
His work is transgressive and hard-edged and yet sometimes also experimental, while the influences seem to be everything from, well, authors typified as New Weird to mainstream literary to graphic novels.
Under the name of Ruptured World, he released his first album, "Exoplanetary", with the dark ambient music label Cryo Chamber, run by Simon Heath of Atrium Carceri, in August 2018.
[4] Ruptured World released a second album with Cryo Chamber, called Archeoplanetary, in July 2019,[5] and has since released several albums, including Interplanetary (June 2020),[6] Shore Rituals (April 2021), Xenoplanetary (January 2023), and Void Rituals (February, 2024).
Exosferics released its debut album Demiurgic Velocities of Arcane Signals on Shady Ridge Records in September 2024.