What is Rubidium?
Rubidium is a free and open source rendering engine replacement for the Minecraft client that greatly improves frame rate and stutter while fixing many graphical issues. It features extensive compatibility with the Fabric mod ecosystem compared to other mods, and it does so without compromising the look and feel of the game, giving you that authentic blocky game feel.
Can you put shaders?
Yes, thanks to the Oculus that brings the possibility of putting shaders
Does it consume less CPU and RAM?
Yes, due to Smooth Boot and LazyDFU Mods that reduce CPU consumption and FerriteCore that reduce RAM consumption