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

Features

• Global Ilumination
  • Screen Space Visibility Bitmask Indirect Lighting (SSVBIL)
  • Ground Truth Visibility Bitmask Global Illumination (GT-VBGI)
• Realistic, real-time, and fast Atmospheric Scattering
  • Unreal Engine Sky Atmosphere Rendering Technique
  • Epipolar Sampling
• High-quality, fast, and adaptive Shadows
  • Rectilinear Texture Warping (RTWSM)
• Real-time Volumetric Clouds
  • Nubis

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.