[1.21.1] Underlay v1.0.2 is a release file of the Minecraft mod Underlay for NeoForge, made for Minecraft 1.21.1. It was published on June 6, 2026 and is 0.3 MB in size. For the full description, screenshots and every other version, visit the Underlay mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
