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La Flòr Principal is a handcrafted Minecraft shaderpack built around one goal: making every hour of the in-game day feel alive. Instead of cranking up bloom and calling it done, this shader layers together a full atmospheric pipeline — from physical sky scattering at dawn to torch-lit caves with warm amber glow — so that the world looks different, feels different, and plays differently depending on when and where you are.

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🌅 Dynamic Sky & Time-of-Day Atmosphere

The sky is never static. La Flòr Principal uses a Rayleigh-style scattering model that shifts the sky gradient based on sun angle: midday gives you a crisp cerulean dome that deepens toward the zenith, while sunrise and sunset transition through rich amber and violet tones that bleed into the horizon fog. Twilight windows are tightly tuned pulse functions — you'll notice a real "golden hour" at approximately 6:00 AM and 6:00 PM game time, not just a color swap.

At night, the sky fills with a procedural twinkling star field that fades naturally near the horizon so it never looks pasted on.

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☁️ Volumetric Clouds with Wind & Sunset Tinting

Clouds are rendered using domain-warped FBM (Fractional Brownian Motion) — a technique that prevents the repetitive grid pattern common in simpler shaderpacks. The result is organic, puffy cloud shapes that shift and dissolve over time as a wind vector slowly scrolls them across the sky.

Cloud lighting is gradient-aware: the underside of each cloud is darker and cooler, while the lit top catches the sun's color. During twilight, clouds pick up the warm orange-red of the setting sun along their edges, creating naturally cinematic silhouettes without any manual tuning.

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💡 PBR Lighting — Terrain, Entities & Held Items

All solid blocks, entities, and held items are lit through a unified PBR (Physically Based Rendering) pipeline that reads OptiFine/Iris normal maps and specular maps when present. Even without a PBR resource pack, the shader improves:

• Sun/moon directional lighting — includes specular highlights and normal-map bumpiness on blocks that support it
• Torch/artificial light — warm amber-orange (#E5701A) point-light contribution with a directional bias, so torches feel like they're actually casting light rather than just brightening a lightmap value
• Ambient sky tint — the ambient fill color shifts with time of day: lavender-pink in the morning, neutral at midday, deep blue-violet at midnight

Pair it with any PBR pack (such as Patrix or SEUS PTGI's resource pack) and surfaces gain real specular reflections and depth from their normal maps.

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🌫️ Atmospheric Fog with Weather Reactivity

Terrain fades into colored fog that matches the sky state: pale blue-gray during clear days, warm amber-tinted at dusk, dark blue at night, and a heavier desaturated gray-green during rain. Rain strength directly increases fog density (up to ~4× denser in a downpour), making storms feel claustrophobic and intense without breaking visibility entirely.

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🌊 Underwater Volume

When the camera dips below water, the shader switches to an underwater rendering pass with its own light attenuation and color grading — blue-green volume with depth-based darkening, giving ocean and river exploration a distinct visual identity.

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🎨 Consistent Color Palette

Every lighting state in La Flòr Principal is tuned against the same palette:

Time	Sky / Fog	Torch	Ambient
Morning	Soft lavender-pink	Warm amber	Rosy fill
Midday	Cerulean blue	Warm amber	Neutral white
Dusk/Dawn	Amber-orange horizon	Warm amber	Golden-violet
Night	Deep indigo	Warm amber	Cool blue
Rain	Slate gray-green	Warm amber	Desaturated

This consistency means screenshots look intentional rather than accidental — every biome and build style benefits from the same careful calibration.

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⚙️ Compatibility

• Requires: OptiFine (HD U G9+) or Iris Shaders (1.x)
• Tested on: Minecraft Java Edition 1.16 – 1.21
• PBR Support: Reads normals and specular maps — works with any LabPBR-compliant resource pack
• Performance: Forward-rendering only (no deferred pass), suitable for mid-range GPUs

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🌺 Why "La Flòr Principal"?

The name means "The Main Flower" — a reference to the idea that good lighting is the centerpiece everything else in a scene grows around. Trees look better. Builds look better. Even flat plains get character when the light is right.

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Compatible with OptiFine and Iris. Screenshots are always welcome — tag your builds!