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Mineforgian

Alpha Piscium

High-quality realistic Minecraft shaderpack.

171K загрузок176 подписчиковGPL-3.0-onlyiris

Обновлён 28 июня 2026 г. · опубликован 9 октября 2025 г.

  • Specular GI Update #1
  • Specular GI Update #7
  • Specular GI Update #6
  • Specular GI Update #5
  • Specular GI Update #4
  • Specular GI Update #3

Alpha Piscium

High-quality realistic Minecraft shaderpack featuring global illumination, volumetric clouds, atmospheric scattering, and stunning visual effects.

Official Website link: https://alphapiscium.org/
Discord server link: https://discord.gg/E2Uq2MmHgq

Alpha Piscium

Features

Installation

  1. Download the Alpha Piscium shaders for Minecraft from Modrinth or GitHub Release.
  2. Install Iris shader loader.
  3. Open the Minecraft launcher and choose the Iris profile you just created with the version you're playing.
  4. Launch Minecraft.
  5. Go to Options → Video Settings → Shader Packs, then click Open Shader Pack Folder.
  6. Move the downloaded ZIP file into this folder (.minecraft/shaderpacks).
  7. In-game, select the newly installed pack from the shaders list. (If you select a shader pack using Iris, its filename will turn yellow.)
  8. Click Done or Apply and the shader will be loaded.

FAQ

  • No lighting at night: Please use PBR resource packs. For vanilla style, SPBR is recommended. Otherwise, try Patrix.
  • Can't load shaderpack: Please use Iris with version 1.7 or higher.
  • Everything goes dark when turning back: This is due to the limitations of screenspace techniques. There isn't a perfect way to fix this.
  • Intel GPU: Alpha Piscium uses cutting-edge graphics technology. Unfortunately, Intel doesn't maintain their OpenGL driver well, so Intel GPUs are not supported.
  • AMD GPU: Check if your GPU driver is newer than 22.7.1. If older, please update your driver.
  • Other loading errors: Press Ctrl+D in Iris's shaderpack selection screen, then reload the shaderpack. Make an issue with the error message and the relevant files in .minecraft/patched_shaders as shown in the error message.

Roadmap

1.9 Specular GI

  • Add specular GI

2.0 World Space Tracing

  • Add voxelization and voxel tracing

2.1 DRT Update

  • Release Skibidi DRT
  • HDR mod support?

2.2 Volumetrics shadowing

  • Add cloud shadowing to volumetrics
  • Add screen space shadow to volumetrics

2.3 Local fog

  • Add ground fog

2.4 Cloud shadow

  • Add cloud shadow to terrain rendering
  • Add cloud to reflection/GI

2.5 Cloud update part 1

Improve cloud lighting

  • Add altocumulus
  • Rewrite cirrus modeling

2.6 Cloud udpate part 2

  • Rewrite cumulus modeling
  • Add stratocumulus and nimbostratus

2.7 Upscaling???

  • Add FSR 3.1 (no framegen)

2.8 Parallax mapping???

  • Add steep/smooth parallax mapping
  • Add parallax mapping shadow

License

Files under the scripts directory are licensed under the MIT License. All other files are licensed under the GNU General Public License v3.0.

Версии

ВерсияКаналИграЗагрузчикиДатаСкачать
1.9.1Релиз1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris28 июня 2026 г..jar (48.3 МБ)
1.9.1-Beta1Бета1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris17 июня 2026 г..jar (48.3 МБ)
1.9.0Релиз1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris26 мая 2026 г..jar (48.8 МБ)
1.9.0-Beta1Бета1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris19 мая 2026 г..jar (48.8 МБ)
1.8.6-Hotfix1Релиз1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris2 мая 2026 г..jar (47.4 МБ)
1.8.6Релиз1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris26 апреля 2026 г..jar (47.4 МБ)
1.8.6-Beta1Бета1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris21 апреля 2026 г..jar (47.4 МБ)
1.8.5Релиз1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris6 апреля 2026 г..jar (47.3 МБ)
1.8.5-Beta2Бета1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris3 апреля 2026 г..jar (47.3 МБ)
1.8.5-Beta1Бета1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris29 марта 2026 г..jar (47.4 МБ)
1.8.4Релиз1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris7 марта 2026 г..jar (47.4 МБ)
1.8.3Релиз1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris8 февраля 2026 г..jar (47.3 МБ)
1.8.2Релиз1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris31 января 2026 г..jar (47.3 МБ)
1.8.1Релиз1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris22 января 2026 г..jar (45.5 МБ)
1.8.0Релиз1.21.11-rc1, 1.21.11-rc2, 1.21.11-rc3, 1.21.11iris11 января 2026 г..jar (45.4 МБ)

Показаны последние 15 из 30 версий. Все версии — на Modrinth.

Ченджлог

1.9.1Релиз1.21.11-rc2, 1.21.11-rc3, 1.21.11 · 28 июня 2026 г.

Highlight

  • Reworked ReSTIR GI reuse and denoising to reduce fireflies, specular instability, and temporal artifacts
  • Optimized the reuse texture pipeline to lower overhead while keeping clustered spatial reuse effective

New

  • Added water wave frequency and speed settings
  • Added a PowerShell shadesmith runner for configured local execution

Improvement

  • Improved ReSTIR spatial reuse with quad-group / 8-sample grouping, tighter pass limits, and reuse-texture packing changes
  • Improved specular GI stability with better temporal reprojection, pairwise MIS metadata handling, and specular-lobe-biased resampling
  • Reduced blur and flicker in denoising, TAA, RTWSM, diffuse AO, water surfaces, and auto exposure behavior at low FPS
  • Optimized shadow sampling and removed unnecessary work from specular reprojection and caustics filtering
  • Updated shader/options/program generation scripts for the current pass layout and multi-properties workflow

Fix

  • Fixed ReSTIR spatial reuse texture tiling and continue-trace discard issues
  • Fixed specular reprojection failure noise and over-blurred smooth reflections in the denoiser
  • Fixed the SETTING_DENOISER_ACCUM switch and the spatial-filter disabling setting
  • Fixed TAA edge-pixel out-of-bounds artifacts
  • Fixed screen-space shadow acne on very flat surfaces
  • Fixed indirect/program pass generation issues

Misc

  • Merged GI edge classification with volumetrics depth layers
  • Moved ReprojectInfo out of GI common utilities and cleaned up related reuse / temporal code
  • Removed obsolete caustics filter, redundant surface-position specular reprojection, and unused GI helper paths
1.9.1-Beta1Бета1.21.11-rc2, 1.21.11-rc3, 1.21.11 · 17 июня 2026 г.

Highlight

  • Reworked ReSTIR GI reuse and denoising to reduce fireflies, specular instability, and temporal artifacts
  • Optimized the reuse texture pipeline to lower overhead while keeping clustered spatial reuse effective

New

  • Added water wave frequency and speed settings
  • Added a PowerShell shadesmith runner for configured local execution

Improvement

  • Improved ReSTIR spatial reuse with quad-group / 8-sample grouping, tighter pass limits, and reuse-texture packing changes
  • Improved specular GI stability with better temporal reprojection, pairwise MIS metadata handling, and specular-lobe-biased resampling
  • Reduced blur and flicker in denoising, TAA, RTWSM, diffuse AO, water surfaces, and auto exposure behavior at low FPS
  • Optimized shadow sampling and removed unnecessary work from specular reprojection and caustics filtering
  • Updated shader/options/program generation scripts for the current pass layout and multi-properties workflow

Fix

  • Fixed ReSTIR spatial reuse texture tiling and continue-trace discard issues
  • Fixed specular reprojection failure noise and over-blurred smooth reflections in the denoiser
  • Fixed the SETTING_DENOISER_ACCUM switch and the spatial-filter disabling setting
  • Fixed TAA edge-pixel out-of-bounds artifacts
  • Fixed screen-space shadow acne on very flat surfaces
  • Fixed indirect/program pass generation issues

Misc

  • Merged GI edge classification with volumetrics depth layers
  • Moved ReprojectInfo out of GI common utilities and cleaned up related reuse / temporal code
  • Removed obsolete caustics filter, redundant surface-position specular reprojection, and unused GI helper paths
1.9.0Релиз1.21.11-rc2, 1.21.11-rc3, 1.21.11 · 26 мая 2026 г.

Highlight

  • Added specular GI

New

  • Added specular GI

Fix

  • Increased AE speed at low fps
  • Fixed screenspace shadow uninitialized warnings
  • Fixed handheld alpha test shadow
  • Fixed Voxy before 0.2.6
1.9.0-Beta1Бета1.21.11-rc2, 1.21.11-rc3, 1.21.11 · 19 мая 2026 г.

Highlight

  • Added specular GI

New

  • Added specular GI

Fix

  • Increased AE speed at low fps
  • Fixed screenspace shadow uninitialized warnings
  • Fixed handheld alpha test shadow
1.8.6-Hotfix1Релиз1.21.11-rc2, 1.21.11-rc3, 1.21.11 · 2 мая 2026 г.

Fix

  • Fixed no voxy bug
1.8.6Релиз1.21.11-rc2, 1.21.11-rc3, 1.21.11 · 26 апреля 2026 г.

Highlight

  • Added Voxy support
  • Switched to Adobe f82 Schlick fresnel, replacing the previous HCM model for more accurate specular appearance

New

  • Added video render mode setting

Improvement

  • Switched to regular spherical cap GGX VNDF sampling for translucent
  • Shadow sample optimization for improved performance

Fix

  • Fixed temporal reuse exploding after zooming in
  • Fixed shadow rendering on SSS (subsurface scattering) surfaces
  • Fixed water scattering overflow near sunset/sunrise
  • Fixed time_interpolate behavior
  • Fixed atmosphere depth break indirect dispatch

Misc

  • Cleaned up SST and ReSTIR temporal reuse logic
1.8.6-Beta1Бета1.21.11-rc2, 1.21.11-rc3, 1.21.11 · 21 апреля 2026 г.

Highlight

  • Voxy integration merged — distant terrain from the Voxy mod is now supported
  • Switched to Adobe f82 Schlick fresnel, replacing the previous HCM model for more accurate specular appearance

New

  • Added video render mode setting for cinematic/recording workflows

Improvement

  • Switched to regular spherical cap GGX VNDF sampling for translucent specular
  • Shadow sample optimization for improved performance
  • Cleaned up SST and ReSTIR temporal reuse logic

Fix

  • Fixed temporal reuse exploding after zooming in
  • Fixed shadow rendering on SSS (subsurface scattering) surfaces
  • Fixed water scattering overflow near sunset/sunrise
  • Fixed time_interpolate behavior
  • Fixed atmosphere depth break indirect dispatch
1.8.5Релиз1.21.11-rc2, 1.21.11-rc3, 1.21.11 · 6 апреля 2026 г.

Highlight

  • Major improvements to ReSTIR SSGI stability and quality

New

  • Readded RCRS anti firefly to GI denoiser pipeline
  • Added ReSTIR Temporal Reuse Limit setting for better user control on GI responsiveness
  • Added FXAA as TAA history missing fallback

Improvement

  • Combined sun and moon Sky-View LUT
  • Optimized colored shadow precondition check
  • Uses blue noises in ReSTIR for better noise distribution
  • Reduced denoiser history fix leaks
  • Improved shadow AABB calculation and cleanup
  • ReSTIR uses full bilateral bilinear temporal resampling to improve stability and quality
  • Updated default accumulation settings for less lighting lags
  • Reduced GI reprojection false anti-stretching history kills
  • GI denoiser history fix skips first 3 LODs for fewer fireflies
  • Replaced bloom hard clipping with soft clipping
  • Switch TAA variance AABB history ratification from clamping to clipping
  • Optimized ReSTIR reuse passes
  • Water volume tweak
  • Use AABB clipping for fast history clamping
  • Use bilinear on fast history for free blurring and fewer noises
  • Use distance between probe pixel position and origin position as fade distance

Fix

  • Fixed atmosphere mie coefficient calculation for low turbidity value
  • Fixed DH water material detection
  • Fixed DH water shadow blending
  • Fixed random emissive from DH solid
  • Slightly mitigated shadow acne
  • Fixed SSS singularity bug in SRGB rendering working space
  • Removed denoiser stabilization pass to fix bleeding
  • Fixed GI grid pattern artifacts caused by bad reprojectInfo.curr2PrevScreenPos precision
  • Fixed TAA reset missing
  • Fixed emissive bug on 0 albedo material

Misc

  • Migrated cloud ambient LUT to shadesmith tiles for optimized texture management
  • Cleaned up SSBO usage
  • Removed env probe setup clearing
  • Fixed make zip naming

huge_2026-04-02_20 55 01-lossy huge_2026-04-02_20 47 47-lossy huge_2026-03-29_01 55 59-lossy huge_2026-03-24_08 04 24-lossy

Полная история изменений — на Modrinth.

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