FeatherLight Shaders pour Minecraft 1.21.1, 1.21

🪶 Featherlight Shaders

Beautiful shaders that don't need a beast PC. Featherlight is built to run smoothly on old laptops and low-end GPUs while still looking realistic, and it scales all the way up to Ultra if you've got the power.

✨ Features

🌊 Realistic water

• Crystal-clear shallows that fade into turquoise depths
• Refraction, sunlight caustics on the seabed, and shore foam
• Sun glint and sky reflections, plus terrain reflections on High/Ultra
• 4 water styles: Clear, Biome, Ocean, Crystal

🤿 Underwater

• See clearly while swimming, with no flat blue wall
• Caustics dancing on the floor and sunbeams through the water
• Look up and see the world above through the surface

🌌 Realistic night sky

• Thousands of coloured, twinkling stars that rotate with the sky
• The Milky Way with dust lanes, a moon halo and a soft airglow

🔮 Dreamy End

• A swirling pink, violet and cyan nebula with a glowing eclipse
• Soft violet light on the End islands

☀️ Lighting & atmosphere

• Soft sun and moon shadows
• Gradual sunrises with a dim red sun rising through the haze
• God rays, bloom, and lit clouds (white by day, orange at sunset, moonlit at night)
• Waving grass, flowers, leaves and water
• Soft border fog, so chunks fade in instead of popping

⚙️ Presets: one click, then tweak anything

Preset - Best for

🥔 Potato - Very old PCs and laptops. No real shadows, maximum FPS 🟠 Low - Weak GPUs. Light shadows, realistic water and stars 🟡 Medium (default) - Most PCs. Soft shadows, caustics, Milky Way, god rays, bloom 🟢 High - Good GPUs. Sharper shadows, terrain reflections, anti-aliasing 🔵 Ultra - Strong GPUs. Maximum quality

Every feature has its own on/off switch and sliders, organized into menus: Shadows, Lighting, Water, Underwater, Fog, Atmosphere, Sky, Waving and Post Processing.

📥 Installation

• Install Iris (Fabric/NeoForge) or OptiFine
• Put the .zip in .minecraft/shaderpacks (don't unzip it)
• Go to Options → Video Settings → Shader Packs → Featherlight

💡 Tips for low-end PCs

• Start on Potato. If your FPS is good, try Low.
• Shadows cost the most FPS, then Terrain Reflections and God Rays.
• After updating the pack, re-select a preset so the new defaults apply.

✅ Compatibility

• Minecraft: 1.21 and newer
• Loaders: Iris and OptiFine
• Dimensions: Overworld, Nether and End all supported

📜 Permissions

✅ Use it in videos, streams and screenshots (monetized is fine; a link back is appreciated) ✅ Include it in modpacks that download it from this page ❌ No re-uploads, selling, or claiming it as your own

Found a bug or have an idea? Leave a comment!

Made by ralph-abdo