mountopacity-1.0.1+1.21-neoforge.jar is a release file of the Minecraft mod Mount Opacity for NeoForge, made for Minecraft 1.21, 1.21.1. It was published on October 23, 2024 and is 0 MB in size. For the full description, screenshots and every other version, visit the Mount Opacity mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.