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Alpha Piscium

High-quality realistic Minecraft shaderpack.
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Alpha Piscium v1.9.2

File nameAlpha Piscium v1.9.2.zip
Uploader
Luna5amaLuna5ama
Uploaded
Aug 15, 2026
Downloads
762
Size
48.2 MB
File ID
8652462
Type
R
Release
Supported game versions
  • 26.1.2
  • 26.1.1
  • 26.1
  • 1.21.11
  • 1.21.10
  • 1.21.9
  • 1.21.8
  • 1.21.7
  • 1.21.6
  • 1.21.5
  • 1.21.4
  • 1.21.3
  • 1.21.2
  • 1.21.1
  • 1.20.6
  • 1.20.5

What's new

Highlight

  • Improved ReSTIR GI, denoising, shadows, and compute-pipeline performance
  • Stabilized specular GI demodulation and fixed remaining numerical overflow

New

  • Added configurable built-in metalness overrides and material data for known blocks
  • Added comprehensive English and Simplified Chinese maintainer documentation

Improvement

  • Optimized pass ordering and combined direct lighting with sky compositing
  • Improved ReSTIR spatial clustering, tiling, temporal neighbor sampling, and reuse-texture generation
  • Reduced compute-shader texture fetches, material decoding, dynamic indexing, and redundant work
  • Simplified and optimized GI denoising by removing spatial variance processing and unrolling shared-memory kernels
  • Improved specular denoiser accumulation, history reprojection, and remodulation
  • Bypassed TAA-dependent FXAA and sharpening passes when TAA is disabled

Fix

  • Fixed selection-box geometry writing an unintended view-depth target and causing a glow artifact
  • Fixed specular GI numerical overflow, built-in PBR F0 handling, and minimum-reflectance clamping
  • Fixed CIE XYZ luminance calculations
  • Fixed clouds disappearing during shadow sampling
  • Fixed atmospheric view-depth reconstruction, GI history dithering, and invalid spatial-reuse traces

Misc

  • Removed obsolete shader code, redundant texture reads, unused denoiser resources, and stale GI debug data
  • Updated package branch detection and support for newer Minecraft version numbers
  • Fixed Windows options-generator recursion and Kotlin launcher detection

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