Blender Today LIVE #286

Announcements

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What's new in Blender?

July 09-21, 2026, at 12:00 Amsterdam CEST+0200 258 commits in total, of which 116 are fixes, 30 cleanup, and 50 refactors.

Animation

• 🔸 Anim: Replace with duplicate Action operator - Christoph Lendenfeld
• 🔸 Anim: Convert animation between rotation modes - Christoph Lendenfeld
• 🔸 Anim: Improved AnimData rename API - Christoph Lendenfeld
• 🔸 Anim: Pause playback on scrub - Bar Borer

Assets

• 🔸 Assets: Delay import of listing_downloader on startup - Sergey Sharybin

Audio

• Audaspace: porting changes from upstream. - Jörg Müller

Build

• Build: Replace deprecated usage of CMake -H by -S in GNUmakefile - Jonas Holzman

Cleanup

• Cleanup: Use int2 instead of std::pair for Delaunay Triangulation - Hans Goudey
• Cleanup: move shutil import in asset library listing downloader code - Sybren A. Stüvel
• Cleanup: Fix typos - Sean Kim
• Cleanup: Texture Paint: Comment out debug print - Brecht Van Lommel
• Cleanup: Texture Paint: Remove some dead code from pixel setup - Brecht Van Lommel
• Cleanup: Texture Paint: Update pixel compression stats debug code - Brecht Van Lommel
• Cleanup: Remove mpq headers from BLI_delaunay_2d.hh - Hans Goudey
• Cleanup: deduplicate domain enum definitions - Jacques Lucke
• Cleanup: Move function definition within file - Hans Goudey
• Cleanup: Remove unused UVIsland function - Hans Goudey
• Cleanup: Remove unnessary bitwise OR - Sean Kim
• Cleanup: Improve types used for sculpt undo attribute reference - Hans Goudey
• Cleanup: fix warning regarding std::char_traits<const char> . - Bastien Montagne
• Cleanup: quiet GCC's enumerated and non-enumerated type warning - Campbell Barton
• Cleanup: remove unused variables, wrap long lines - Campbell Barton
• Cleanup: spelling in comments (make check_spelling_*) - Campbell Barton
• Cleanup: Cycles: Use utility function to copy mesh vert triangles - Hans Goudey
• Cleanup: Texture Paint: Canonical variable names for vert & corner - Hans Goudey
• Cleanup: clarify naming for line height and character width - Campbell Barton
• Cleanup: de-duplicate sequencer text insertion - Campbell Barton
• Cleanup: remove unused PyC_Object_GetAttrStringArgs - Campbell Barton
• Cleanup: BLI: Remove commented out code - Falk David
• Cleanup: Fix docstring for corner_tri_get_real_edges - Sean Kim
• Cleanup: annotate cryptic format string for Python's argument parsing - Campbell Barton
• Cleanup: include functions names in Python argument parsing strings - Campbell Barton
• Make format. - Howard Trickey
• Cleanup: Improve comment in creator crash handling call once logic - Jonas Holzman
• Cleanup: string formatting warning on Linux - Campbell Barton
• Cleanup: update GCC version check for warning suppression - Campbell Barton
• Cleanup: spelling in comments (make check_spelling_*), variable names - Campbell Barton

Compositor

• Compositor: Add ID_RECALC_COMPOSITOR for scene IDs - Omar Emara
• 🔸 Compositor: Default to a Group Input node instead of Render Layers - Omar Emara

Core

• RNA: add unit test for RNA_generate_keys_for_path_rename() - Sybren A. Stüvel
• BLI: Add tracy markers in Delaunay Triangulation code - Falk David

Curves

• 🔸 Curves: new sculpt Cut brush - RedMser

Cycles

• Cycles: HIP-RT: Skip visibility check for primitives - Sergey Sharybin
• Cycles: HIP-RT: Remove primitive bounds valid check - Sergey Sharybin
• Cycles: HIP-RT: Remove BVH steps - Sergey Sharybin
• Cycles: HIP-RT: Reduce indirections in the BVH traversal - Sergey Sharybin
• Cycles: HIP-RT: Remove custom arrays for primitive indices - Sergey Sharybin
• Cycles: HIP-RT: Always use balanced build for BLAS - Sergey Sharybin
• Cycles: HIP-RT: Use Balanced for Hair and Quality for triangles - Sergey Sharybin
• Cycles: HIP-RT: Use Balanced BVH for pointcloud primitive - Sergey Sharybin
• Cycles: Use minimum 64x64 tile size for texture cache load - Brecht Van Lommel

EEVEE

• 🔸 EEVEE: Add denoising render passes - Christoph Neuhauser

Fixes

• Fix #158830: Missing data-block defaults for modifier inputs - Hans Goudey
• Fix: VSE: Cannot prefetch sequencer-input scene strips - John Kiril Swenson
• Fix: VSE: Clear cache of seq-input scene strips when modifying their contents - John Kiril Swenson
• Fix: use of undefined variable listing_downloader.py - Campbell Barton
• Fix #137232: KDE+Wayland+Vulkan failure to restore cursor grab position - Campbell Barton
• Fix #161257: Camera background Movie Clip missing update on reload - Philipp Oeser
• Fix #157591: Grease Pencil UV attributes missing viewport update... - Philipp Oeser
• Fix #161185: USD export of a rigged nurbs surface is empty - Philipp Oeser
• Fix #160076: GP: New Deselect Linked missing from the menus - Pratik Borhade
• Fix: Regression: Wrong annotation layer icon in outliner - Pratik Borhade
• Fix #62258: UI: Prevent overlap of Adjust Last Operation panel - Pratik Borhade
• Fix: Nodes: Various Add/Swap menu entries not in alphabetical order - quackarooni
• Fix: clarify Grease Pencil layer/material "pass_index" tooltips - Philipp Oeser
• Fix #161263: Handle empty bundle lists in Geometry Nodes - Tibo Stans
• Fix #160310: VSE: Strip animations don't play in sequencer-type scene strips - John Kiril Swenson
• Fix: Geometry Nodes: Inconsistent style for drag-search label for Repeat zones' Iteration input - quackarooni
• Fix #159075: UV tool settings reset on operator redo in mesh edit-mode - Campbell Barton
• Fix: Preferences: "Global" keymap items not aligned with other keymap items - quackarooni
• Fix #161299: GPU: Crash using certain custom Python shaders - Clément Foucault
• Fix #161338: Crash rendering empty subdivided mesh in Cycles - JustSamPai
• Fix several potential errors when reading corrupted DNA data. - Bastien Montagne
• Fix: Outliner scroll to new collection fails when active object exists - Pratik Borhade
• Fix #160952: Grease Pencil: Hiding material causes visual error - Casey Bianco-Davis
• Fix #160815: Core: Saving creates excessive threads - Le Gia Bao
• Fix #159727: Muted nodes prevent color change - Amine Bensalem
• Fix #158108: Clear stale liquid mesh after failed cache load - Tibo Stans
• Fix #161299: GPU: Crash using certain custom Python shaders - Clément Foucault
• Fix: Texture paint issues in recent optimizations - Brecht Van Lommel
• Fix #161243: use-after-free in handling of link/append/pack data during packing. - Bastien Montagne
• Fix: Images: Excessive texture and mipmap updates - Brecht Van Lommel
• Fix: Images: Missing partial update path for grayscale buffers - Brecht Van Lommel
• Fix: Cycles: Build failure when transparent shadows are disabled in kernel - Brecht Van Lommel
• Fix #161196: Modifier edit and cage visibility issues - Campbell Barton
• Fix #159634: EEVEE: Adapt hit delta epsilon to accept negative values - Christoph Neuhauser
• Fix: Curves: Sculpt brush assert for 2-point curve - RedMser
• Fix: partial data used when a data-block fails to read - Campbell Barton
• Fix: out-of-bounds struct reconstruction with inconsistent DNA sizes - Campbell Barton
• Fix: out-of-bounds struct reconstruction with an invalid block count - Campbell Barton
• Fix: out-of-bounds read from an invalid block struct index - Campbell Barton
• Fix: null dereference reading a corrupt global or user-prefs block - Campbell Barton
• Fix: null dereference freeing a partially-read window - Campbell Barton
• Fix: null dereference linking a data-block that fails to read - Campbell Barton
• Fix potential null access in bpy code. - Bastien Montagne
• Fix: Use-after-free in link/append code. - Bastien Montagne
• Fix #161363: Crash switching to Weight Paint with Geometry Nodes - Tariq-Sulley
• Fix: Nodes: Wrong option in drag and drop search menu - илья _
• Fix #161071: UI: Shape Key ctrl-select breaks with two properties - Ahmed Nassar
• Fix: Potential crash with "Replace with Duplicate Action" operator - Christoph Lendenfeld
• Fix: Missing break - Pratik Borhade
• Fix: Heap-use-after-free renaming DNA struct member - Bastien Montagne
• Fix BLI scoped timer with window, add invalid window/sampling values asserts. - Bastien Montagne
• Fix: Cycles crash after recent commit - Hans Goudey
• Fix #161352: EEVEE: Avoid resetting sampling every frame - Le Gia Bao
• Fix: Images: Thread sanitizer warnings in partial update - Brecht Van Lommel
• Fix: Images: Memory leak in GPU upload on failed allocation - Brecht Van Lommel
• Fix: Images: Excessive threading overhead in GPU partial update - Brecht Van Lommel
• Fix: overlay engine test failure caused by change to final/cage mesh equality - Campbell Barton
• Fix: Sculpt: Use correct quaternion identity value for pivot rotation - Sean Kim
• Fix: cursor offset error inserting multiple characters at once - Campbell Barton
• Fix: crash in Armature Edit mode after duplicating animated bone - Sybren A. Stüvel
• Fix #161362: Prevent regular properties to access meta-data PointerRNA. - Bastien Montagne
• Fix: File Browser draws empty-list message in wrong color - Pablo Vazquez
• Fix #161369: Vulkan: Ray Query tests fail on MSVC Release builds - Miguel Pozo
• Fix #161450: Use after free crash in edge loop relax - Tariq-Sulley
• Fix #161194: Restore implicit UV map selection for legacy textures - Tibo Stans
• Fix #161468: Color strip dimensions aren't set when calling #new_effect - il4n
• Fix #161434: Cycles: Transmission passes missing with thin glass - Weizhen Huang
• Fix: corrupt linked block silently treated as missing - Bastien Montagne
• Fix: Grease Penci: Regression: Drawing fills with strokes become cyclic - Falk David
• Fix: Creating new collection crashes in outliner in absense of active element - Pratik Borhade
• Fix: resource leak in bpy.app.timers return value - Campbell Barton
• Fix: resource leak accessing BMesh MLoop Color - Campbell Barton
• Fix: resource leak from missing PyBuffer_Release in gpu.shader - Campbell Barton
• Fix: resource leak when an imbuf image could not be written - Campbell Barton
• Fix: memory leak assigning the target property functions - Campbell Barton
• Fix: libraries.load swapped "set_fake" & "recursive" arguments - Campbell Barton
• Fix: memory corruption passing "options" to keyframe_delete - Campbell Barton
• Fix: memory leak looking up collections with an allocated key - Campbell Barton
• Fix: error over-decrementing PyC_DefaultNameSpace - Campbell Barton
• Fix: crash using the temp_data() target after the context exits - Campbell Barton
• Fix: bmesh layer copy_from & remove ran with invalid arguments - Campbell Barton
• Fix: memory leaks setting invalid ID property UI data - Campbell Barton
• Fix: reference leak calling GPUOffScreen.bind() - Campbell Barton
• Fix: crash discarding bpy.data.temp_data() without entering it - Campbell Barton
• Fix: use-after-free evaluating a driver after renaming variables - Campbell Barton
• Fix: out-of-bounds read passing "name" keywords to GPUShaderCreateInfo - Campbell Barton
• Fix: potential use-after-free calling bmesh.ops looked up via getattr - Campbell Barton
• Fix #151054: hidden datablocks visible in prop() search results - Kévin Dietrich
• Fix #161335: Vulkan: Crash in --gpu-device help - Le Gia Bao
• Fix: Only invoke the crash handler once - Jesse Yurkovich
• Fix: VSE: Incorrect text selection/cursor draw and interaction when mirrored - John Kiril Swenson
• Fix #161421: VSE: Off-center origins offset rendered result for reduced output resolutions - John Kiril Swenson
• Fix: Cycles: Hydra add-on missing panels - Brecht Van Lommel
• Fix: Cycles: Hydra render delegate broken by ray visibility refactor - Brecht Van Lommel
• Fix: Cycles: Hydra use-after-free deleting light and geometry - Brecht Van Lommel
• Fix: Cycles: Hydra uses unsupported GPU when driver is outdated - Brecht Van Lommel
• Fix: Cycles: Poor texture cache initialization time with many tiles - Alex Fuller
• Fix: out-of-bounds read in mathutils.geometry.delaunay_2d_cdt - Campbell Barton
• Fix: retiming_transition_add duration property description - Bart Nagel
• Fix: exception changing a Python custom property to data-block type - Campbell Barton
• Fix #161438: Exception thrown in custom property type change - David Xchel Morales Hurtado
• Fix: delaunay tests broken in #ifdef'd out code. - Howard Trickey
• Fix: Overlay: Clamp axis aligned ortho view grid to lowest level - Alex Hetherington
• Fix #161530 glTF: Fix exporting multiple material with vertex color - Julien Duroure
• Fix: Nodes - remove undo flag from copy clipboard operator - RedMser
• Fix #161407: Cycles texture cache HDRI broken with CPU + GPU render - Brecht Van Lommel
• Fix & Improve threaded zstd blendfile compression code. - Bastien Montagne
• Fix #161668: UI: Change in default direction for expanded enum buttons - Guillermo Venegas
• Fix #161637: Crash when accessing Brush direction enum without context - Sean Kim
• Fix #161550: Crash displaying file info with an incorrect modified date - Jesse Yurkovich
• Fix: Silent compiler warning - Pratik Borhade
• Fix: string formatting & correction to BMesh operator exceptions - Campbell Barton
• Fix #161595: Console paste crashes when commands change the context - Campbell Barton
• Fix #161013: Outliner "Scroll to Active" uncollapses items undesirably - Pratik Borhade
• Fix #161515: EEVEE: SubSurface Scattering: Uninitialized loads - Clément Foucault
• Fix: Composite node has no width when opened in Blender 4.5 - Habib Gahbiche

Geometry Nodes

• 🔸 Geometry Nodes: Add "Miter Scale" option to curve to mesh node - Hans Goudey

Git

• Tools: fix KeyError in weekly report script - Sybren A. Stüvel

GPU

• GPU: Initialize Vulkan on demand in background mode - Brecht Van Lommel
• GPU: Pass gpu_backend to get_gpu_device_vendor in render tests - Mark van de Ruit
• GPU: Shader Tool: Series of cleanup/fixes/refactor - Clément Foucault
• GPU: Shader Tool: Add WIP BSL parser and split shader tool tests - Clément Foucault
• GPU: Support integer and boolean types in GPU Material - Cristian Ivana

i suffix

• i suffix - Hans Goudey

Keymap

• 🔸 Keymap: Nodes: Shift+X for dissolve and Ctrl+X for Cut - Habib Gahbiche

Modeling

• Modeling: Warn when spacing edge loops evenly on face selections - Tariq-Sulley

Nodes

• 🔸 Nodes: Convert Grease Pencil node enums to menu sockets - quackarooni
• 🔸 Nodes: Properly name node after link-drag-search - Brady Johnston

Outliner

• 🔸 Outliner: Use active element for creating new collection - Pratik Borhade
• 🔸 UI: Outliner Scroll view to the recently created collection - Pratik Borhade

Paint

• Texture Paint: Remove boolean "tag" from UVBorderEdge struct - Hans Goudey
• Texture Paint: Slightly improve UV island construction - Hans Goudey
• 🔸 Texture Paint: Store UV border edge primitive index as index - Hans Goudey
• Texture Paint: Reference UVEdge by index - Hans Goudey
• Texture Paint: Reference UVVert by index - Hans Goudey
• Texture Paint: Slightly optimize triangle edges creation - Hans Goudey

Python

• PyAPI: resolve technical resource leaks with PyType_Ready - Campbell Barton
• PyAPI: resolve technical resource leak accessing bpy_wm_capabilities - Campbell Barton
• PyAPI: resolve technical resource leak in Blender's atexit callback - Campbell Barton
• PyAPI: resolve technical reference counting error in bpy.app.handlers - Campbell Barton
• PyAPI: resolve technical resource leak in PyC_RunQuicky - Campbell Barton
• PyAPI: note that it's expected PyCapsule_New is valid - Campbell Barton
• PyDoc: Document the undo argument when calling operators - Olayinka Vaughan

Refactor

• Refactor: Adjust Sculpt Mode flushing for render - Matej Kotas
• Refactor: EEVEE: LTC matrix packing and translucent BxDF changes - Mark van de Ruit
• Refactor: Images: Apply partial GPU texture updates on acquire - Brecht Van Lommel
• Refactor: Images: Compute partial update regions on demand - Brecht Van Lommel
• Refactor: Images: Deduplicate and improve GPU upload - Brecht Van Lommel
• Refactor: Images: Improve ImBuf update marking - Brecht Van Lommel
• Refactor: Images: Make partial update marking thread safe - Brecht Van Lommel
• Refactor: Images: Move GPU texture partial update to ImBuf - Brecht Van Lommel
• Refactor: Images: Move partial update tracking from Image to ImBuf - Brecht Van Lommel
• Refactor: Images: Reduce number of GPU texture sub update calls - Brecht Van Lommel
• Refactor: Images: Remove IB_RECT_INVALID and IB_DISPLAY_BUFFER_INVALID - Brecht Van Lommel
• Refactor: Make RNA struct/function/property use typed enums for flags. - Bastien Montagne
• Refactor: pose paste code - Christoph Lendenfeld
• Refactor: Texture Paint: Avoid many small allocs for UV primitive lookup - Brecht Van Lommel
• Refactor: Texture Paint: Avoid many small allocs for vert/edge/prim maps - Brecht Van Lommel
• Refactor: Texture Paint: Avoid UDIM tile loops per pixel - Brecht Van Lommel
• Refactor: Texture Paint: Avoid unneeded zero initialize for undo tiles - Brecht Van Lommel
• Refactor: Texture Paint: Copy undo tiles outside the global lock - Brecht Van Lommel
• Refactor: Texture Paint: Do seam copy serial, multi-threading makes it worse - Brecht Van Lommel
• Refactor: Texture Paint: Don't build edge list and edge maps - Brecht Van Lommel
• Refactor: Texture Paint: Don't store primitive data for all UDIM tiles - Brecht Van Lommel
• Refactor: Texture Paint: Fast sRGB conversion path for byte buffers - Brecht Van Lommel
• Refactor: Texture Paint: Fix O(n^2) complexity on long UV island borders - Brecht Van Lommel
• Refactor: Texture Paint: Fix poor time complexity in island construction - Brecht Van Lommel
• Refactor: Texture Paint: Fuse image read, write and blend loops - Brecht Van Lommel
• Refactor: Texture Paint: Only build UV island data structures near borders - Brecht Van Lommel
• Refactor: Texture Paint: Only do seam copy for affected image tiles - Brecht Van Lommel
• Refactor: Texture Paint: Optimize triangle inside test for rasterization - Brecht Van Lommel
• Refactor: Texture Paint: Optimize undo tile detection while painting - Brecht Van Lommel
• Refactor: Texture Paint: Optimize with contiguous pixel row runs - Brecht Van Lommel
• Refactor: Texture Paint: Parallelize border extension and extraction - Brecht Van Lommel
• Refactor: Texture Paint: Parallelize image undo encode over tiles - Brecht Van Lommel
• Refactor: Texture Paint: Parallelize mask dilation over UDIM tiles - Brecht Van Lommel
• Refactor: Texture Paint: Parallelize mask rasterization over UDIM tiles - Brecht Van Lommel
• Refactor: Texture Paint: Parallelize UV island detection - Brecht Van Lommel
• Refactor: Texture Paint: Parallelize UV island mask dilation - Brecht Van Lommel
• Refactor: Texture Paint: Remove UVIslands struct - Hans Goudey
• Refactor: Texture Paint: Remove vert_tris from persistent pixel data - Brecht Van Lommel
• Refactor: Texture Paint: SIMD optimize sRGB conversion - Brecht Van Lommel
• Refactor: Texture Paint: Split seam copy per pixel data structure - Brecht Van Lommel
• Refactor: Texture Paint: Steal paint tile buffer for image undo encode - Brecht Van Lommel
• Refactor: Texture Paint: Store per-primitive pixel data in tight Array - Brecht Van Lommel
• Refactor: Texture Paint: Store pixel start coord per run - Brecht Van Lommel
• Refactor: Texture Paint: Store pixel to 3D position per primitive - Brecht Van Lommel
• Refactor: Texture Paint: Use TriRasterizer for mask rasterization - Brecht Van Lommel
• Refactor: Texture Paint: Watertight rasterization - Brecht Van Lommel
• Refactor: Use BM_mesh_edgeloops_find for Circularize - Tariq-Sulley
• Refactor: Use BM_mesh_edgeloops_find for Space Edge Loops Evenly - Tariq-Sulley
• Refactor: Use FunctionRef for BM_mesh_edgeloops functions - Tariq-Sulley

Sculpt

• 🔸 Sculpt: Add option to transform only pivot - ethan

Tests

• Tests: Add many lights render test - Miguel Pozo
• Tests: add corrupt .blend reader files - Campbell Barton

Translations

• I18N: Updated UI translations from git/weblater repository (4d34bbee606410). - Bastien Montagne
• I18N: Updated UI translations from git/weblate repository (c916188216fbc6). - Bastien Montagne

User Interface

• UI: Add tests for pie menus - phantomsoldierking
• 🔸 UI: Improved IME Support - Campbell Barton
• 🔸 UI: Multi-line labels - Guillermo Venegas
• 🔸 Theme: Cleanup: Remove Theme Space Title setting - Pablo Vazquez
• 🔸 UI: Anim: Unify Keying options in Playback Controls - Pablo Vazquez

Utilities

• Utilities: Add batch files to help launch Blender with OpenGL backend and factory settings - Alaska

Video Sequencer

• 🔸 VSE: Improve meta strip selection logic - il4n
• 🔸 VSE: Update scene strip content length when scene changes length - Falk David

XR

• 🔸 XR: Add Vive Tracker interaction profile extension - Ethan Porcaro

🔗 projects.blender.org/blender/blender/commit/c2a37974a