Catalyst Client
by Acropol1ss
Catalyst Client is a Fabric client mod for Minecraft 1.21.11 that gives the game a new visual style based on the lore of the Catalyst Prologue project.
What it does
Catalyst Client changes how the game looks on the player's own screen, building on the setting of the Catalyst Prologue project. It is meant to be paired with the Catalyst Prologue special mod, which supplies the localization, visual additions and gameplay parts that Catalyst Client leans on. Fabric API must be present for the mod to load.
The mod is licensed under All rights reserved and is not open source. Skyboxify is an optional companion, and the mod works with support from special shader mods. Files are published for Fabric only, and the latest build, 0.1.1, targets 1.21.11, with a first release on 2026-03-04 and the most recent update on 2026-10-11. The issue tracker is the public place to report problems.
Key features
Lore-based visual style
A new look drawn from the Dramatic Skys demo setting, applied to the client view of the game.
Catalyst Prologue integration
Localization, visual additions and gameplay parts come from the Catalyst Prologue special mod, which the visual layer depends on.
Shader compatibility
The style is built to sit alongside special shader mods, so players can keep a shader pack in use.
Dramatic Skys styling
Sky and atmosphere elements follow the Dramatic Skys demo, with Skyboxify available as an optional addition.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Optional 1
Use cases
Single-player with the Catalyst setting
A player who wants the Catalyst look in a single-player world installs the client mod with Fabric API and Catalyst Prologue.
Pairing with shaders
Players who run a shader pack can add Catalyst Client to keep the lore-based style alongside shader effects.
Who it’s for: Players who follow the Catalyst Prologue project and want its visual style on their own client. Since the mod is client-side only, it does not need to be installed on a server.
Questions
Does Catalyst Client need Fabric API?
Does a server need Catalyst Client installed?
Is Skyboxify required to use Catalyst Client?
Which game version does Catalyst Client support?
What the author says
A special mod for Catalyst Prologue that contains the necessary parts of gameplay Adds: - localization - new visual style based on lore and "Dramatic Skys Demo" - music - as well as with the support of a special mod and shaders - atmosphere
Official listing
- Modrinth page
- modrinth.com/mod/catalyst-client
- Owner
- Acropol1ss
- Published
- 2026-03-04
- Updated on Modrinth
- 2026-10-11
- Facts verified
- 2026-10-15