![Faster Shadow Mapper [FSM]](https://cdn.modrinth.com/data/OsnvQwPM/225357d59ebc34a578942fde6ee1979d6b9ea4cb_96.webp)
ModsJava
Faster Shadow Mapper [FSM]
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
Slightly improves the speed of the shadow mapper in popular shader mods including Iris, Optifine, Oculus and Beryl.
⬇ Download on ModrinthQuick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21, 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.
File checked by MCModsHub
- Ships as fastershadowmapper+1.21.1-neoforge-1.0.2.jar — drop this file into the mods folder
- Download size: 21 KB
- Download link checked 9 Nov 2026 — working
These come from our own check of the pack file, not from the source page.