Underwater Lighting Improvements
Sodium fixes many graphical issues with smooth lighting while underwater.
Biome Blending Improvements
Sodium improves biome blending to use gradients across each block, making the effect look much smoother.
Fluid Rendering Improvements
Sodium implements smooth lighting for all fluids, fixing a long-standing issue in Minecraft.
Block Shading Improvements
Sodium greatly improves the shading of blocks, fixing a number of bugs while making block shadows look more smooth and consistent.
Sodium greatly optimizes the game's renderer to be faster and more efficient, which can often result in FPS improvements of 300% or more.