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Alpha Piscium

Alpha Piscium

High-performance realistic Minecraft shaderpack.

7,796
25

Compatibility

Minecraft: Java Edition

1.21–1.21.10
1.20.5–1.20.6

Platforms

Links

Report issues View source Join Discord server
Sponsor on GitHub

Creators

Luna5ama
Luna5amaMember

Details

Licensed GPL-3.0-only
Published 2 months ago
Updated 5 days ago

Alpha Piscium

High-performance realistic Minecraft shaderpack featuring SSVBIL, volumetric clouds, atmospheric scattering, and stunning visual effects.

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

2025-09-26_03 40 46

Features

FAQ

  • No lighting in the night: Please use a PBR resource packs. For vanilla style, SPBR is recommended. Otherwise, Patrix.
  • Can't load shaderpack: Please use Iris with version 1.7+.
  • Everything goes dark when turning back: This is due to the limitation of screenspace techniques, there isn't a perfect way to fix this.
  • Intel GPU: Alpha Piscium uses cutting edge graphics technology. Unforunately Intel doesn't maintain their OpenGL driver well. Thus can't support Intel GPU.
  • AMD GPU: Check if your GPU driver is newer than 22.7.1, if older please update your driver.
  • Other loading error: Press Ctrl+D in Iris's shaderpack selection screen. 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

1.7 Cumulus Cloud (Volumetric Cloud)

  • Improve cumulus clouds shape
  • Improve cloud lightings
  • Improve cloud upscaling

1.8 Diffuse GI

  • Diffuse GI improvement
  • Denoiser overhaul
  • ReSTIR Diffuse "GI”

1.9 Volumetrics Shadows

  • Screen space shadow for volumetric rendering
  • Cloud shadows

1.10 Shadow

  • Optimize PCSS for both quality and performance
  • Epipolar sampling screen space shadow
  • Address shadow map light leaks

1.11 More Volumetrics

  • Clouds in sky lighting
  • Fog

1.12 Specular GI

  • Add specular GI

1.13 More Cloud

  • Improve cirrus cloud shape
  • Mid altitude clouds (altocumulus)

1.14 Parallax Mapping?

  • Add steep parallax mapping?
  • Add smooth parallax mapping?
  • Add parallax mapping shadow?

1.15 ???

License

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