Luminol Republic Shader

A potato-friendly shader that looks high-end. It runs on weak hardware (built and tuned for an iPad on Amethyst) and still has clouds you can fly into, a rebuilt underwater world, a nebula End, a stormy Nether and real weather.

Requires: Iris + Sodium · Minecraft 26.2 · tested versions: Iris 1.11.4, Sodium 0.9.2

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Seven profiles, color-coded

Potato · Extremely Low · Low · Balanced (default, recommended) · Medium · High · Ultra Every setting also shows a colored performance tag, so you can see what each one costs: Very Low (blue) · Low (green) · Medium (yellow) · High (red) · Ultra (pink)

Three cloud styles

• Classic (Flat) - the lightest option, for Extremely Low and Low.
• Boxy Clouds - thick, soft, rounded boxy clouds for Balanced and Medium. They have a Cloud Distance setting.
• Volumetric - real 3D clouds with self-shadowing, for High and Ultra.

Cloud Mode: Drawn or Interactable. Interactable clouds hang at a real height (Y 192 by default), so you can fly up to them and into them. Mountain tops can poke through a cloud bank.

Underwater Overhaul

Light is absorbed by color: red fades first, then green, and the deep goes blue. You also get caustics, light shafts, and a bright window to the surface. How bright it is underwater depends on the depth and on whether you are under open sky.

Sky and night

Round, glowing sun · aurora borealis · shooting stars · a pulsing, colorful nebula sky in The End · a rose-pink haze Nether with warm glow.

Weather Overhaul

Wet surfaces and puddles, rain ripples on lakes and puddles, faint distant rain, lightning flashes and storm gloom.

Water, light and post-processing

Smooth waves and a natural teal-to-blue lake color · shadows · god rays · bloom · motion blur · depth of field · sharpening · warm color grade. All are optional.

Performance tools

• Smart Culling skips work you can't see: far shadows, far puddles and caustics, empty-sky blur, and god rays that can't reach.
• Leaves: Solid (Full Block) makes leaves solid cubes with no alpha test, like Fast graphics. It is on by default for Potato, Extremely Low and Low.
• The HUD is never touched by post effects.

Compatibility

• Bobby: works.
• Distant Horizons: LODs get matching lighting, water and haze. This support is experimental and has had little testing.
• Voxy: not supported yet.

Tips

• Start on Balanced. If you're short on frames, go down a profile, or turn Shadows, Smart Culling and Leaves: Solid on first.
• Not every setting has been tested on every device. If something looks wrong on yours, tell me which profile and device you used.