Lumen

Very light shaders:

Feature List

Water

• Procedural animated water waves
• Large and small wave layers
• Distance-based wave detail reduction
• Physically inspired water normals
• Fresnel reflections
• Sky, sun and moon reflections
• Dimension-specific reflections in the Nether and End
• Depth-based water color and transparency
• Rain ripples
• Wave foam and shoreline foam
• Underwater refraction effects
• Water caustics
• Underwater light rays
• Underwater fog and color absorption

Boat and Player Wake

• Persistent water wakes behind boats and moving players
• V-shaped Kelvin-style boat wakes
• Central turbulent wake trail
• Wake foam
• Wave propagation and gradual damping
• Teleport and invalid-movement protection

Boats

• Support for vanilla boats, chest boats and bamboo rafts
• Support for newer boat variants
• Boats visually follow larger water waves

Sky and Atmosphere

• Procedural Overworld sky
• Smooth day and night transitions
• Sunrise and sunset coloring
• Procedural sun and moon
• Procedural stars
• Atmospheric scattering
• Distance fog
• Weather-dependent sky and lighting changes

Clouds

• Procedural layered clouds
• Dynamic day, sunset and moon lighting
• Adjustable cloud quality

Lighting

• Dynamic ambient lighting
• Hemisphere-based sky lighting
• Warm block and torch lighting
• Weather-dependent lighting
• Lighting support for terrain, entities, held items and translucent objects
• Wet surface reflections
• Dimension-specific lighting

Shadows

• Dynamic sunlight shadows
• Soft filtered shadows
• Angle-dependent shadow bias
• Shadows for terrain, entities, weather and translucent objects
• Wider and softer underwater shadows
• Configurable shadow quality

Ambient Occlusion

• Support for vanilla vertex ambient occlusion
• Optional screen-space ambient occlusion
• Distant Horizons compatibility for AO processing

Godrays

• Sun and moon godrays
• Screen-space light-ray occlusion
• Weather-dependent godray intensity
• Separate underwater light-ray system

Bloom and HDR

• HDR bloom
• Dimension-specific bloom adjustments
• Highlight protection

Nether

• Custom procedural Nether sky
• Dark ambient lighting
• Strong lava emission and bloom

End

• Procedural space sky
• Multiple star layers
• Galactic bands and dust clouds
• Procedural nebulae
• Star clusters
• Multi-directional colored lighting
• End-specific fog reflections

Performance and Compatibility

• Multiple performance profiles
• Adjustable quality for shadows, clouds, water and End sky effects
• Minecraft Java support from 1.16.5 to 1.21.x
• Iris, Oculus and OptiFine compatibility
• Support for older and newer block ID systems
• Separate rendering pipelines for the Overworld, Nether and End
• Compatibility fallback for modded dimensions
• Support for translucent materials and per-buffer blending

Not Included (Some planned)

• Ray tracing or path tracing
• Screen-space reflections of blocks and entities
• PBR or LabPBR resource-pack support
• Parallax occlusion mapping
• Temporal anti-aliasing
• Motion blur
• Depth of field
• Chromatic aberration
• Dynamic colored lighting from individual blocks
• Physically simulated water flow or buoyancy
• Fully raymarched volumetric clouds