atmul-1.0.0-neoforge-1.21.4.jar is a release file of the Minecraft mod AtMUL - Atmospheric Materials & Unobtrusive Lighting for NeoForge, made for Minecraft 1.21.4. It was published on October 29, 2025 and is 0.8 MB in size. For the full description, screenshots and every other version, visit the AtMUL - Atmospheric Materials & Unobtrusive Lighting mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
