It allows resource packs to replace Sodium's internal shaders, much like vanilla resource packs can override core shaders. This enables custom visual effects while still using the Sodium performance mod.

Resource packs can override Sodium's shaders for blocks, clouds, and terrain rendering. This can enable effects like night vision, energy glows, or custom lighting if the pack is compatible.

Shaders are placed in folders such as assets/sodium/shaders/blocks/ for files like block_layer_opaque.fsh and .vsh, and assets/sodium/shaders/clouds/ for clouds.fsh and .vsh.

The mod includes defines such as RENDER_PASS_SOLID, RENDER_PASS_CUTOUT, and RENDER_PASS_TRANSLUCENT. These correspond to different terrain render types.

Not all vanilla shader packs will work. Only packs explicitly built for Sodium Core Shader Support are compatible.

It is designed for players and creators who want custom visual effects while using the Sodium performance mod. It targets those wanting shader replacement support without giving up Sodium.