Adds OptiFine's (internal) shader with Old Lighting to Iris, recreating the look without needing Optifine installed.
The performance impact is near zero.
We've tested it on 26.1.2, but it should also work on other versions.
Quick facts
- Edition: Minecraft Java
- File type: .zip (resource pack)
- Minecraft version listed: 26.1.2
- How to install: Download the .zip resource pack — do not unzip it. → Put it in .minecraft/resourcepacks. → Enable it in Options → Resource Packs.
- 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 — see the MC Java Mods guides for the full walkthrough.
Verified by MCModsHub
- Downloads as Internal.zip
- Download size: 15 KB
- Download link checked 14 Sept 2026 — working
These come from our own check of the pack file, not from the source page.