Rubidium is an unofficial fork of CaffeineMC’s Sodium, available for Forge and NeoForge on Minecraft 1.16.5–1.20.1. It optimizes chunk rendering, reduces memory usage, and helps deliver steadier frame times. Multithreaded block updates reduce stutters, while smooth lighting supports fluids and other special blocks.
For your own Minecraft server setup, rent a server and install Rubidium with one click from the panel to use it when playing in your world.