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Blender 4.5 LTS: Corrective Releases

Blender 4.5.2

Released on August 20th 2025, Blender 4.5.2 features 111 bug fixes:

  • Cleanup bpy builds on PyPI and archive them on Download. (infrastructure/meta#146)
  • Vertex/Weight Paint Mask issues with subdivision. (#143317)
  • Regression: Shading Issue transforming a object with custom normals. (#142485)
  • Missnamed Built-In Shader. (#143485)
  • Asset browser capture screenshot preview does not capture Cycles rendered preview. (#141732)

  • Usd

    World uses wrong output node. (#143291)

  • Vertex Weight Proximity sets Normalize Weights checkbox to default state after options switch. (#143360)

  • Ui

    grey-out NDOF orbit center settings in "Fly mode". (98596c9bcc)

  • Fix: Grease Pencil: Remove fill guide attribute in remove_fill_guides. (5c1e9125b9)
  • Tool gizmo disappears when resizing regions & areas. (#143629)
  • Pivot to Active Vertex in Mesh Sculpt mode not working. (#143630)
  • Fix: SculptSession#last_active_vert uses incorrect value. (fa3bebbbd6)
  • bpy.ops.grease_pencil.join_selection(type='JOIN') makes existing strokes broken. (#142325)
  • Action editor with playhead snapping crash. (#143154)
  • macOS complains about being unable to use Vulkan if a user reuses Vulkan user preferences. (#143304)
  • (blender/blender@Clipping Region) Multi 3D Views & Alt+B enabled - click selection picks mesh outside region before target in mesh edit mode. (#142800)
  • Attribute node (Type: View Layer) is not updated during playback in EEVEE when nothing is animated. (#143323)
  • OpenGL: --debug-gpu doesn't work in background mode. (#142620)
  • Field Nodes not outputing values from node groups. (#142202)
  • Old AMD Drivers: Crashes on startup (4.4.0 and above). (#143087)
  • Error "Selected faces required" When Using 'K' Knife Cut After Confirming Previous Cut with 'Shift+K' in Edit Mode. (#143439)
  • Hydra Storm: Error in console when rendering. (#143722)
  • Fix: Nodes: restore active node after copy-pasting nodes. (0a37bba5a9)
  • Dot dash modifier makes grease pencil disappear. (#143870)
  • Solidify Algorithm Behaves Strange/Different in 4.5. (#143789)
  • Vulkan: Assert when sliding vertex. (#143685)
  • Blender displays a crash popup when OSL camera references oso file that doesn't exist. (#143907)
  • Fix: Cycles: Show correct minimum OptiX GPU driver in preferences. (c1c735dd5a)
  • Repeated deletion & Ctrl+Z on a linked library may cause crash. (#143888)
  • Broken Normals when realizing Instances with Geometry Nodes that have an Object with WeightedNormal Modifier (and mirrored). (#143708)
  • Regression: Crash in Vertex & Weight Paint when applying deform modifier. (#143238)
  • Fix: Poll function for asset screenshot operator. (7a1ad217c6)
  • Intel Arc OpenGL: GPU compositor infill is inconsistent. (#141173)
  • Volume shader masked by shader with alpha blend transparency. (#143294)
  • NVIDIA Vulkan: Blender 4.5 crash on startup with MSI Afterburner/RivaTuner Statistic Server. (#141806)
  • Fix: VSE: Wrong context used when dropping audio files. (d648f12475)
  • Cryptomatte: Precision issues with matte output. (#143775)
  • Bevel & Join Geometry crash. (#143450)
  • Viewport: Blender crashes when entering sculpting mode. (#142093)
  • Problem with edit lines display on grease pencil object. (#143952)
  • 4.5 LTS: Fix: armature "Auto-Name by Axis" creating invalid UTF8 names. (b670fad9cb)
  • Cleanup: No longer require VSE Strip struct memory layout to never change (blender/[email protected]). (c4c612ba53)
  • Intel Windows OpenGL: Dilate node feather mode does not work. (#141436)
  • Curves in EDIT mode appear thinner than in OBJECT mode on HiDPi displays. (#141980)
  • Vertex Paint: Subtract blending mode is broken. (#143399)
  • Regression: Frustum culling is incorrect in Blender 4.5 with older AMD GPU drivers. (#143336)
  • Transparent background is not fully transparent in Workbench Render Engine. (#144040)
  • Curves Edit Mode: Redo duplicate move broken. (#143739)
  • Fix #144014: Driver for data.shape_keys path fails with GPU subdivision. (#144030)
  • Weight Painting Stroke Falloff Not Rounding. (#134160)
  • Sculpt: Repeatedly Remeshing causes out of memory crash. (#143257)
  • Nuked my C: drive accidentally using Blender. (#139585)
  • Assert browsing a non UTF8 render output path. (#143018)
  • Creating a face between two edges can result in a bow-tie quad. (#143905)
  • Running New Scene in an Empty file crashes blender. (#144086)
  • ASAN error when viewing collection in the spreadsheet. (#143532)
  • Eevee World Sun Shadow no longer works in 4.5. (#142046)
  • “Clear Keyframes” Affects All Bones. (#143818)
  • Compositor Keying node "Feather Size" and "Dilate Size" inputs do nothing when given negative values. (#144070)
  • Fix: Assert in Keying node with no input. (d117ef4af3)
  • VSE video thumbnails performance / UI smoothness issues (since 4.3?). (#142912)
  • Animation FPS progressively slower from Blender 4.3 to 4.5. (#140706)
  • Assertion: BLI_string_ref.hh operator, at 'index < size_'. (#143539)
  • Eevee World Sun Shadow no longer works in 4.5. (#142046)
  • Fix: EEVEE: VolumeProbeModule do_full_update_. (20f7bc6750)
  • Cryptomatte picker does not work with sequences. (#144107)
  • Vulkan AMD: Wireframe overlay renders without occlusion culling when smooth wires is turned off. (#142537)
  • Grease Pencil Bezier Curves, doesn't respect Overlay Guides when Grid Snapping is on. (#143534)
  • Blender has stopped working when copying a Grease-Pencil stroke in Edit-mode. (#142700)
  • VSE proxies for image sequences do not work (since 4.5). (#144254)
  • Node tool crashes under specific scenario. (#144126)
  • 4.5 Grease Pencil Light feature doesn't work anymore. (#144170)
  • Sculpting Dynotopo R Button display artifact (NOT Critical). (#142927)

  • Eevee

    Shadows are missing if trasparency of a material is set by Instance or Object attributes. (#144054)

  • Mesh transforms do not show up in the viewport if Blender is run with --debug-gpu-force-workounds. (#144174)
  • Blender Project Instant Crash Upon Opening. (#143720)
  • Grease Pencil 3 Moving Strokes to other layers cause them the lose Parenting. (#139258)
  • Calling 'bpy.ops.object.lineart_bake_strokes' through the Python API in 4.5+ causes the UI to stop responding. (#144392)
  • Edge slide misbehaves when sliding towards triangle. (#144270)

  • Vse

    Scopes sometimes stop updating during playback. (#144432)

  • Return value of bpy.app.translations.locales changed in 4.5. (#144306)
  • Vulkan: Disable descriptor buffers. (84d0840f0c)
  • Vulkan: Destroy resources in submission thread. (3b081259ef)
  • Fix: Compositor: Wrong tooltip for Crop Node. (3c2bd8cde6)
  • Removing and then redefining override causes a crash. (#144373)
  • Fix #144408: Crash when cancelling primitive tool with automerge on empty drawing. (#144470)
  • Grease Pencil: Convert Curve Type operator always creates Bézier curves with free handles. (#144369)
  • Crash when setting default_value for a color socket on a material node group. (#143551)
  • Fix: GL Compilation Subprocess race condition. (05b26ef4eb)
  • Compositor crash cycling between inputs in compositor. (#144411)
  • Crash in texture drawing. (#143691)
  • Fix: Grease Pencil: Attribute interpolate with randomization. (1b6c73b091)
  • Reprojcting Bezier Grease Pencil Strokes doesn't move the handles with the strokes. (#131108)
  • Fix: Grease Pencil: Bézier handles not effected by Snap To Grid. (0c6941eee3)
  • Fix #139094: Grease Pencil: Primitive Tools not initializing u_scale attribute. (72bf515e58)
  • Fix: Grease Pencil: SVG and PDF bounding box size bug. (118fe9cd24)
  • Cycles: oneAPI: Disable L0 copy optimization for several dGPUs. (4bc473807f)
  • grease pencil 3.0 subdivision pinches at the stroke's start point. (#142644)
  • FBX exporter encounters error when exporting meshes with tangents. (#144592)
  • Fix: execute_node_group only accepting positive values for arguments. (bc6bc8f5d5)
  • Animation & Overrides; Keyframe insertion should result in warning/error?. (#144371)
  • Build: Only link to librt on Linux. (41539e4fa8)
  • Fix: Build failure on riscv64 platform. (9745245933)
  • Blender crashes opening certain file. (#144749)
  • ACES 1.3 errors in Blender 4.5.1. (#144681)
  • LineArt: Backport thickness to radius conversion. (ae8a273c7a)
  • Can't Keyframe or add driver to UV Map active render property. (#142780)
  • Vulkan Backend Renders Control Points Incorrectly. (#143231)
  • Vulkan: Swap to system memory for device local memory. (92cb40fd2e)
  • Vulkan: Displaying Bone Keys in Graph Editor Causes VRAM Leak. (#142305)
  • Fix: Vulkan: Use after free when switching scenes. (960e0dae10)

Blender 4.5.1

Released on July 29th 2025, Blender 4.5.1 features 89 bug fixes:

  • Fix: Only last tangents layer is exported to fbx when mesh has multiple uv layers. (3a16c4995a)
  • LibraryOverride bug because of Hair Curves. (#139527)
  • Sculpting "Surface Smooth" causes decimation of Geometry. (#141753)
  • Back side of rotate gizmo appears when approaching small object. (#111060)
  • Crash when using cryptomatte node with image sequence having different sizes. (#141810)
  • Unexpected Behavior on Closed Grease Pencil Curves with Connected Proportional Editing. (#142025)
  • Geo Nodes Input Panel crashing when name is deleted. (#141911)
  • Manifold boolean with plane is offset. (#142326)
  • Light Temperature's Animate property button keyframes the wrong property. (#142103)
  • Armature: Copy to Selected not working on Editbone "lock" unlocking. (#141940)
  • Armature EditBone RNA paths incomplete. (#142062)
  • Adaptie Subdivision Simple breaks UV. (#142060)
  • Asset Library : Creating new pose library asset keyframes everything. (#141909)
  • When reloading a linked character, while a NLA strip is in edit mode, the base action gets un-slotted. (#139509)
  • Issue building blender 4.5-pre on linux with external manifold 3.1.1. (#141943)
  • Critical error when importing animation data from previous versions. (#142106)
  • batch_for_shader with custom glsl shader very slow when inputs are optimized out of the shader program. (#137429)
  • Blender had a crash after exporting Grease Pencil to PDF. (#142183)
  • Consistent crash: 2 image sequence materials playing from video files. (#141918)
  • Bevel (selection including border edges) crashes. (#142045)
  • Broken USD skeletal animation rotations because of quaternion discontinuity. (#141718)
  • Importing certain USD files crashes Blender. (#142084)
  • MeshSequenceCache modifier does not read Edge Creases. (#141633)
  • Blender crashes switching to sculpt mode on a hidden mesh. (#141827)
  • Memory leak when exporting object(s) with subdivision modifier to FBX. (#128169)
  • 4.5.0 - EEVEE 3D viewport Smudgy animation playback. Different results when multiple 3D viewports are open. (#142217)
  • Material preview lighting changed between 4.5 and 4.4.3 on old Intel hardware. (#141781)
  • Crash when skipping outside of simulation cache with Vector Display enabled. (#142259)
  • Crashes when Scaling a Video and Audio Strip in VSE. (#142291)
  • Blender crashes switching to sculpt mode. (#142328)
  • Cycles: oneAPI: Compile only needed device binaries in multi-GPU case. (0b5f1491e7)
  • Blender crashes on exit closing a non-focused window (OpenGL backend + Wayland?). (#141777)
  • Crash adding subsurf with invalid material indices. (#142245)
  • Manifold Boolean Subtraction causes crash. (And is not retaliative). (#142494)
  • Blur Attribute after Manifold Boolean crashing, exaggerated by sample nearest surface. (#142454)
  • New 4.5 FBX importer produces broken rotation curves in some cases (when angle between two keyframes is large). (#142333)
  • Fix #142647: Don't create preset that has the same name as built-in ones. (#142652)
  • Grease Pencil wrong fill shape when removing fill guides. (#142649)
  • Release scripts: Packaged test data is missing folders. (#142489)
  • VSE Retiming and Speed Control are not automatically updating Sene strip subframes while previewing. (#141709)
  • Crash if Realized Instance Contains some weird stored named attribute. (#142163)
  • Crash when use geonode tool on multiple objects. (#142648)
  • Transfer Mesh Data - Always giving warning even though the operator works as intended. (#140376)
  • Vulkan, change view to wireframe crash. (#142097)
  • Vulkan crash when displaying texture on a point generated from geometry node with cycles and eevee views at the same time. (#142255)
  • Regression: UV Editor - Show Faces - no more working. (#142557)
  • 4.5 - Grease Pencil - Color Jitter still not working. (#142006)
  • Windows: graphical crash report appears in background mode. (#142314)
  • Assets Browsers's Capture Screenshot preview area are not correct on macOS. (#141982)
  • Regression: Custom Node Socket Types in Node Tree Interface Not Possible in Blender 4.5.0 LTS. (#142630)
  • Removing keymaps with default names. (#118035)
  • Regression: UV edit cage no longer has corner scale points. (#142811)
  • Adaptive Subdivision in the viewport recalculates when the camera moves. (#142603)
  • 4.5 - Grease Pencil - Color Jitter still not working. (#142006)
  • CompositorNodeVecBlur's use_curved property crashes Blender. (#141970)
  • Cycles Render: Volume (Before Baked Simulation Starts) still trying to be rendered. (#105546)
  • Fix: Crash when group node has no Group Output node. (a1c9bbc17a)
  • Hard crash when using bmesh.ops.split (unreachable code @ bmesh_py_types.cc:4372). (#142633)
  • Vulkan Fails on Windows ARM with Qualcomm Adreno 31.0.112.0+ Driver. (#142859)
  • PyDoc: Document all app handler arguments. (73b2f639a0)
  • When Subdiv is enabled, the size in dimension remain the same (GPU Subdiv off). (#142399)
  • Can't add snap points when only using Grid as a target. (#139530)
  • VSE Adding a new effect displays stale frame (since 4.5). (#142853)
  • Win: Disable bug report button on crash dialog. (4d5328d5da)
  • 4.5 backport: Fix: crash displaying negative numbers in WM_cursor_time. (74102188b6)
  • Crash using Cycles with two Intel GPUs. (#138384)
  • OSL camera fails camera in volume check if the ray is offset too far from the camera. (#139718)
  • Cycles: Lightgroup passes for environment shaders are incorrect. (#142953)
  • Fix: Grease Pencil interpolation on cyclic curves shifts end point. (bf9579e359)
  • Blender 4.5 FBX import crash. (#142972)
  • Utilities: Add batch files to help launch Blender with different GPU backends. (8208e58308)
  • Opening a specific 4.4 file crashes Blender 4.5. (#142954)
  • 4.5 Particle Brushes Lost X-Ray Capability. (#141741)
  • Blender 4.5 shader nodes is no longer able to read undisplaced normals. (#142022)
  • Fix: VSE: Copy to selected would interfere with dual handles. (1df47953ce)
  • Fix: VSE: Cannot ignore connected strips' handles with alt if already selected. (c63b96e14c)
  • Multiresolution: Smooth Mask filter creates patterns. (#142186)
  • Scrape to Plane brush type versioning handles "Plane Offset" incorrectly. (#142151)
  • Crash selecting an armature with over 65k objects. (#143161)
  • Ctrl + H "Hide Other Collections" Pie Menu – Shift to Extend Not Working. (#140548)
  • The "offset even" option in Extrude Individual Faces and Move does nothing. (#135908)
  • Fix #143156: "RGB to BW" node not found in link drag search. (#143174)
  • Fix #142724: Mesh used by boolean modifier missing subdivision in edit mode. (#143135)
  • Fix #143127: UI: Shading UI shows inactive settings in Matcap mode. (#142863)
  • Normal Edit Modifier is not behaving predictably in 4.5. (#143142)
  • Cycles crash on macOS (reproducer blend file included). (#143128)
  • Fix: Vector.to_tuple didn't accept precision of -1. (3e8fbfab71)
  • Grease Pencil: Dot-dash modifier crash with high Gap values. (#143420)
  • Cycles OSL: Shader thumbnail generation leads to crash popups. (#142876)