
Axion v0.2.6
release11 мая 2026 г.v0.2.6: Preview Rendering Recovery, GPU Pipeline Fixes & 1.21.5 Startup Fix
This release fixes the preview rendering regression where block previews, outlines, and guide visuals could disappear without ImmediatelyFast installed. It also stabilizes the new GPU preview path, fixes fluid preview offsets, improves plant/grass surface handling, and fixes a 1.21.5 black-screen startup issue.
Changes
- World Render Callback Fix: Moved Axion world visuals onto the stable
END_MAINrender phase and fixed fallback routing so Fabric event and mixin paths do not suppress each other. This restores outlines, guide arrows, and block previews without relying on ImmediatelyFast. - Large Preview Rendering Fix: Fixed chunked previews reporting success while drawing nothing. Medium and large previews now render reliably again, with the working CPU/Immediate fallback preserved.
- GPU Preview Pipeline Progress: Added a gated custom preview GPU pipeline for 1.21.11 using Axion's
preview_shellshaders and DynamicTransforms. Fixed visibility, alignment, large-coordinate precision jitter, and camera movement issues in the custom GPU path. - 1.21.5 Startup Fix: Excluded modern GPU preview shader resources from the 1.21.5 jar. This prevents the black-screen startup hang caused by 1.21.11 shader imports being packaged into the 1.21.5 build.
- Symmetry Keybind Fix:
Ctrl + RandCtrl + Fsymmetry bindings no longer trigger when Shift is held, allowingCtrl + Shift + R/Fto be used by other bindings.
Supported Versions
1.21.5 through 1.21.11
Support and Feedback
Axion v0.2.6
release11 мая 2026 г.v0.2.6: Preview Rendering Recovery, GPU Pipeline Fixes & 1.21.5 Startup Fix
This release fixes the preview rendering regression where block previews, outlines, and guide visuals could disappear without ImmediatelyFast installed. It also stabilizes the new GPU preview path, fixes fluid preview offsets, improves plant/grass surface handling, and fixes a 1.21.5 black-screen startup issue.
Changes
- World Render Callback Fix: Moved Axion world visuals onto the stable
END_MAINrender phase and fixed fallback routing so Fabric event and mixin paths do not suppress each other. This restores outlines, guide arrows, and block previews without relying on ImmediatelyFast. - Large Preview Rendering Fix: Fixed chunked previews reporting success while drawing nothing. Medium and large previews now render reliably again, with the working CPU/Immediate fallback preserved.
- GPU Preview Pipeline Progress: Added a gated custom preview GPU pipeline for 1.21.11 using Axion's
preview_shellshaders and DynamicTransforms. Fixed visibility, alignment, large-coordinate precision jitter, and camera movement issues in the custom GPU path. - 1.21.5 Startup Fix: Excluded modern GPU preview shader resources from the 1.21.5 jar. This prevents the black-screen startup hang caused by 1.21.11 shader imports being packaged into the 1.21.5 build.
- Symmetry Keybind Fix:
Ctrl + RandCtrl + Fsymmetry bindings no longer trigger when Shift is held, allowingCtrl + Shift + R/Fto be used by other bindings.
Supported Versions
1.21.5 through 1.21.11
Support and Feedback
Axion v0.2.6
release11 мая 2026 г.v0.2.6: Preview Rendering Recovery, GPU Pipeline Fixes & 1.21.5 Startup Fix
This release fixes the preview rendering regression where block previews, outlines, and guide visuals could disappear without ImmediatelyFast installed. It also stabilizes the new GPU preview path, fixes fluid preview offsets, improves plant/grass surface handling, and fixes a 1.21.5 black-screen startup issue.
Changes
- World Render Callback Fix: Moved Axion world visuals onto the stable
END_MAINrender phase and fixed fallback routing so Fabric event and mixin paths do not suppress each other. This restores outlines, guide arrows, and block previews without relying on ImmediatelyFast. - Large Preview Rendering Fix: Fixed chunked previews reporting success while drawing nothing. Medium and large previews now render reliably again, with the working CPU/Immediate fallback preserved.
- GPU Preview Pipeline Progress: Added a gated custom preview GPU pipeline for 1.21.11 using Axion's
preview_shellshaders and DynamicTransforms. Fixed visibility, alignment, large-coordinate precision jitter, and camera movement issues in the custom GPU path. - 1.21.5 Startup Fix: Excluded modern GPU preview shader resources from the 1.21.5 jar. This prevents the black-screen startup hang caused by 1.21.11 shader imports being packaged into the 1.21.5 build.
- Symmetry Keybind Fix:
Ctrl + RandCtrl + Fsymmetry bindings no longer trigger when Shift is held, allowingCtrl + Shift + R/Fto be used by other bindings.
Supported Versions
1.21.5 through 1.21.11
Support and Feedback
Axion v0.2.5
release7 мая 2026 г.v0.2.5: Chunked Preview Deferred Draws, Surface Detection Fixes & Limit Bumps
Deferred GPU draw submission for chunked previews, fixes for surface detection through non-opaque blocks (grass, flowers, crops), server-side block entity snapshot coordinate fixes, and increased operation limits.
Changes
- Undo/Redo Decay Drift Tolerance: History action service now tolerates native block decay drift (grass_block→dirt, mycelium→dirt, podzol→dirt, farmland→dirt, dirt_path→dirt, snow→air) when verifying block state for undo/redo, preventing failures on naturally changed blocks via a hardcoded allowlist.
- Chunked Preview Deferred Draws (1.21.6+): Moved GPU preview submission from per-session immediate draw to a deferred queue flushed after vanilla's WorldRenderer pass, improving compatibility. Added frustum-culled
SectionDrawListand a bulkdrawMultipleIndexedPreviewpath for 1.21.11 (1.21.7 falls back to manual draw loop). AddedChunkedDrawResultenum for proper handled/not-handled reporting. 1.21.5 continues using the legacy CPU preview path. - Block Entity Data Fix: Block entity data is now correctly written during clipboard operations — previously blocks with custom data (banners, signs, etc.) would paste as plain undecorated versions. This fixes decorated banners pasting as white banners, text on signs not persisting, and similar data loss.
- Increased Operation Limits: Raised
PermissiveOperationValidatorlimits (MAX_BLOCKS_PER_BATCH, MAX_TOTAL_WRITES, MAX_CLIPBOARD_CELLS) from ~1.2M–2M to 4M. RaisedPlacementPreviewRenderercell caps from 200K to 4M. - GPU Buffer Fixes: Proper index buffer cleanup when re-uploading vertex data. Sequential index buffer fallback when no index buffer is available.
- Move Source Z-Fighting Fix: The
MOVE_SOURCE_GHOST_SCALE(1.015) was only applied in the entity fallback path, but silently ignored in the mesh cache path (the primary rendering path for most selections). NowtessellateBatch()applies per-block scale, so the gray stained glass move-source overlay renders slightly larger than real blocks at the same position, eliminating z-fighting. - Ghost Preview Threshold Bump: Raised
CHUNKED_PATH_CELL_THRESHOLDfrom 1024 toMAX_TEXTURED_GHOST_BLOCKS(32768), keeping medium previews on the reliable CPU path. - 1.21.7 Compat: Implemented proper GUI-textured
drawTextureusingRenderPipelines.GUI_TEXTURED. AddedRenderPipelineextraction fromRenderLayervia reflection for layer-accurate pipeline selection.
Supported Versions
1.21.5 through 1.21.11
Support and Feedback
Axion v0.2.5
release7 мая 2026 г.v0.2.5: Chunked Preview Deferred Draws, Surface Detection Fixes & Limit Bumps
Deferred GPU draw submission for chunked previews, fixes for surface detection through non-opaque blocks (grass, flowers, crops), server-side block entity snapshot coordinate fixes, and increased operation limits.
Changes
- Undo/Redo Decay Drift Tolerance: History action service now tolerates native block decay drift (grass_block→dirt, mycelium→dirt, podzol→dirt, farmland→dirt, dirt_path→dirt, snow→air) when verifying block state for undo/redo, preventing failures on naturally changed blocks via a hardcoded allowlist.
- Chunked Preview Deferred Draws (1.21.6+): Moved GPU preview submission from per-session immediate draw to a deferred queue flushed after vanilla's WorldRenderer pass, improving compatibility. Added frustum-culled
SectionDrawListand a bulkdrawMultipleIndexedPreviewpath for 1.21.11 (1.21.7 falls back to manual draw loop). AddedChunkedDrawResultenum for proper handled/not-handled reporting. 1.21.5 continues using the legacy CPU preview path. - Block Entity Data Fix: Block entity data is now correctly written during clipboard operations — previously blocks with custom data (banners, signs, etc.) would paste as plain undecorated versions. This fixes decorated banners pasting as white banners, text on signs not persisting, and similar data loss.
- Increased Operation Limits: Raised
PermissiveOperationValidatorlimits (MAX_BLOCKS_PER_BATCH, MAX_TOTAL_WRITES, MAX_CLIPBOARD_CELLS) from ~1.2M–2M to 4M. RaisedPlacementPreviewRenderercell caps from 200K to 4M. - GPU Buffer Fixes: Proper index buffer cleanup when re-uploading vertex data. Sequential index buffer fallback when no index buffer is available.
- Move Source Z-Fighting Fix: The
MOVE_SOURCE_GHOST_SCALE(1.015) was only applied in the entity fallback path, but silently ignored in the mesh cache path (the primary rendering path for most selections). NowtessellateBatch()applies per-block scale, so the gray stained glass move-source overlay renders slightly larger than real blocks at the same position, eliminating z-fighting. - Ghost Preview Threshold Bump: Raised
CHUNKED_PATH_CELL_THRESHOLDfrom 1024 toMAX_TEXTURED_GHOST_BLOCKS(32768), keeping medium previews on the reliable CPU path. - 1.21.7 Compat: Implemented proper GUI-textured
drawTextureusingRenderPipelines.GUI_TEXTURED. AddedRenderPipelineextraction fromRenderLayervia reflection for layer-accurate pipeline selection.
Supported Versions
1.21.5 through 1.21.11