This modpack is the most optimised way to run Distant Horizons with Iris shaders. This pack contains 62 performance and/or QOL mods and 6 DH-compatible shaders. I made this pack as I was tired of poor performance and inconsistencies when running Distant Horizons myself, so I compiled a pack of well-known and very useful mods and decided to share them to the world. I wanted the best possible performance while maintaining the stunning visuals that these mods can provide, and this pack is how I achieved it.
This pack is based off of Fabulously Optimized by robotkoer, however it also contains optimisation and QOL mods not found in this pack, and of course Distant Horizons and its requirements.
WILL ADD OTHER SHADERS ONCE UPDATED TO 1.21.1 ON MODRINTH (Photon etc)
~Isaac
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Downloads as Isaac's Optimized Horizons 1.0.3.mrpack
- Download size: 115 KB
- Download link checked 29 Aug 2026 — working
These come from our own check of the pack file, not from the source page.