VoxLume

WARNING: This Shaderpack It is still under development, expect poor performance and a large number of bugs.

Key features:
Global illumination (VXGI)
Modeling realistic light propagation with multiple light ray bounces.

Irradiance Cache: multiple bounces at low cost; lighting persists off-screen.

Radiance Cascades (experimental): an alternative probe-based GI method.

Voxel Ambient Occlusion (VXAO)

Torches, lanterns, glowstone and other light sources cast ray-traced soft shadows.

Ray-traced sun shadows with a penumbra that widens with distance from the caster.

Voxel reflections that show what’s off-screen.

LabPBR support.

Requirements:
Minecraft Java Edition 26.3 with Iris 1.11.7 or newer.
OptiFine is not supported.
A GPU with OpenGL 4.6; an RTX 4050+ / AMD GPU not supported.