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)
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