Alpha Piscium SHADER PACK
ALPHA
PISCIUM
> VERSION: 1.9.0
> TARGET: MINECRAFT JAVA
> TECH: ReSTIR SSGI / VOLUMETRIC / EPIPOLAR
> STATE: EXPERIMENTAL
CORE MODULES
> GRAPHICS PIPELINE
GI LIGHTING
- > ReSTIR SSGI
- > ReBLUR Denoiser
ref: doi/10.1145/3386569.3392481
ATMOSPHERE
- > UE Sky Render
- > Epipolar Sampling
ref: egsr2020
SHADOWS
- > Adaptive RTWSM
- > Rectilinear Warping
ref: Rosen.2012
VOLUMETRICS
- > Nubis Cloud System
- > Real-time Shaping
tech: Guerrilla
CHANGELOG
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
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
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
HIGHLIGHT
- > Added limited Built-in PBR support
- > Improved translucent rendering with double refraction
NEW
- > Added limited Built-in PBR support (Foliage SSS, Translucent, and Emissive)
- > Added double refraction for non-water translucents for more accurate light bending
- > Added more per-material translucent absorption settings
IMPROVEMENT
- > Migrated TranslucentSST to the new SST implementation, greatly simplifying the code
- > Improved cloud spherical shell setup
- > Improved water scattering with new phase function based on Petzold data
FIX
- > Fixed translucent sky reflection error
- > Fixed DH (Distant Horizons) support
- > Fixed missing TAA clamp mix logic
- > Fixed cloud spherical shell setup
- > Fixed insanely bright emissive from end rod and charged lightning rod
MISC
- > Increased default PCSS sample count for better shadow softness
ROADMAP
v1.9 SPECULAR GI
Add Specular GI
v2.0 WORLD SPACE TRACING
Voxelization / Voxel Tracing
v2.1 DRT UPDATE
Skibidi DRT / HDR Mod Support?
v2.2 VOLUMETRIC SHADOWING
Cloud Shadowing / Screen Space Shadow
v2.3 LOCAL FOG
Add Ground Fog
v2.4 CLOUD SHADOW
Terrain Cloud Shadow / Reflection GI Clouds
v2.5 CLOUD UPDATE PT. 1
Cloud Lighting / Altocumulus / Cirrus Rewrite
v2.6 CLOUD UPDATE PT. 2
Cumulus Rewrite / Stratocumulus / Nimbostratus
v2.7 UPSCALING???
FSR 3.1?
v2.8 PARALLAX???
Parallax Mapping + Shadow
[ROADMAP SNAPSHOT] 04/27/2026 // SUBJECT TO CHANGE
> OPEN FAQ LOG
[ERROR: NIGHT LIGHTING MISSING]
> CAUSE: Vanilla assets.
> FIX: Install PBR Pack (e.g., SPBR, Patrix).
[ERROR: LOADING FAIL]
> FIX: Use Iris 1.7+.
> CMD: Press Ctrl+D to reload.
[HARDWARE MATRIX]
INTEL UNSUPPORTED
AMD DRIVER > 22.7.1
NVIDIA OPTIMIZED
[ARTIFACT LOG]
"Darkness when looking back."
> Screenspace limitation. Status: WONT FIX.
FATAL ERRORS: Report to GitHub with logs from .minecraft/patched_shaders