AuraLite Shaders

# 🌌 AuraLite Shaders (Minecraft 1.16 – 26.2) !(https://img.shields.io/badge/Minecraft-1.16.5%20--%2026.2-blue?logo=minecraft&logoColor=white) (https://img.shields.io/badge/Loader-Iris%20%2F%20Sodium-green)](https://modrinth.com/mod/iris) (https://img.shields.io/badge/API-OpenGL%204.6%20%2F%20GLSL%20460-orange)](https://khronos.org/) (https://img.shields.io/badge/PBR-LabPBR%201.3-cyan)](https://github.com/rre36/lab-pbr) (https://img.shields.io/badge/Release-v1.1.4-purple)](https://github.com/AlexanderNyr/AuraLite-Shaders) (https://img.shields.io/badge/License-CC%20BY--NC--SA%204.0-lightgrey.svg)](https://creativecommons.org/licenses/by-nc-sa/4.0/) **AuraLite** is a modern, lightweight, and highly optimized shader pack built on top of the **OpenGL 4.6 / GLSL 460** standard. It is specifically designed and **tested for Minecraft 1.16 – 26.2 with Sodium + Iris** (and compatible with **OptiFine**, **Oculus**). AuraLite delivers a breathtaking, realistic visual experience without overcomplicating the screen with bloated post-processing effects (such as aggressive motion blur or heavy bloom). A lightweight HDR bloom (gaussian pyramid since v1.1.3, **half-resolution and skippable since v1.1.4**) softly glows emissive sources without smearing the scene. Optional FXAA/SMAA anti-aliasing, SSR, TAA, godrays, and SSAO are profile-scaled so AuraLite keeps **high FPS and smooth frametimes** on modern GPUs. > 🧪 **v1.1.4 note:** Adds tiny **physical-atmosphere LUTs** (`begin`/`begin1` → 64×32 `colortex5` + 32×16 `colortex6`), a **hard Distant Horizons seam** (the v1.1.3 screen-door dither punched white holes on DH 3.2), **DH-aware TAA** with a material reactive mask, a **Gerstner water spectrum**, **half-res schedulable bloom**, and an Iris 1.7.6 compatibility workaround (`dhShadow.enabled=false` by default). **TAA remains on by default in HIGH/ULTRA/EXTREME; camera jitter stays OFF.** See changelog below. --- > ℹ️ **Historical note:** older changelog sections below are preserved as original release notes. ## 🚀 What's New in v1.1.4 — *Atmosphere LUTs, Distant Horizons Seam Fix & Half-Res Bloom* Version **1.1.4** rebuilds the experimental physical sky around shared low-frequency LUTs, replaces the hole-producing DH screen-door seam with a deterministic hand-off, and cuts post-process cost with skippable half-resolution bloom. It also finishes the TAA story for Distant Horizons (correct DH reprojection + Halton jitter on LOD geometry) and swaps glittery water fBm for a coherent Gerstner swell. ### 🧪 Shared Physical-Atmosphere LUTs (`begin` / `begin1`) * **Tiny HDR LUTs, not fullscreen buffers.** v1.1.3 deleted unused full-screen `colortex5`/`colortex6` to save VRAM. v1.1.4 brings them back as **64×32** solar-transmittance (`colortex5`) and **32×16** multi-scatter / ground-bounce (`colortex6`) tables — kilobytes, not megabytes. * **`begin.fsh`** rebuilds direct solar transmittance every frame: sun elevation on X (`−0.16…1.0`, including civil twilight), camera altitude on Y (`0–30 km`), Kasten–Young airmass × Rayleigh + aerosol extinction, zeroed below the night hemisphere. * **`begin1.fsh`** layers bounded multi-scattering and biome-aware ground bounce on top of that transmittance. Noon is Rayleigh-blue; low sun is warm; swamp/snow/vegetation tints come from `GROUND_BOUNCE_MODE`. * **Shared by every physical-sky consumer** — `gbuffers_skybasic`, terrain fog, water analytic reflection, volumetric godrays, clouds and the SSR sky fallback all sample the same LUTs instead of each running a second atmosphere march. * When **`SKY_MODE=0`** (every shipped profile) the LUT passes write constants and cost almost nothing. Enable Physical Sky manually in the Experimental tab. New Experimental → Atmosphere options (off-profile defaults stay cinematic / auto): * **`ATMOSPHERE_TURBIDITY`** — *Crisp / Balanced / Hazy* aerosol load. * **`ATMOSPHERE_SCALE`** — *Compact 25 m / Balanced 50 m / Cinematic 100 m* per block (how Minecraft Y maps into atmosphere kilometres). * **`GROUND_BOUNCE_MODE`** — *Auto (biome-aware) / Neutral Soil / Vegetation / Snow / Desert*. * **`SKY_TEMPORAL`** — rotation-only history blend for the sky (requires TAA). Physical sky uses a higher history weight than the animated gradient sky so stars/aurora do not trail. The swamp detector now also matches **`BIOME_MANGROVE_SWAMP`**. ### 🌍 Distant Horizons — Hard Seam, TAA & Iris Workaround > ⚠️ AuraLite still does **NOT** claim full Distant Horizons compatibility. v1.1.4 is a targeted correctness pass on the v1.1.2/v1.1.3 experimental path. * **Hard deterministic hand-off at `far`.** The v1.1.3 16 m screen-door dither discarded random LOD fragments in the seam band; on DH 3.2 those holes showed sky/white whenever vanilla geometry did not fill the same pixel. DH fragments with `dist < far` are now simply discarded — less cinematic, never stochastic. * **DH re