# Blender Blender 4.5.3 LTS Maintenance Release !

- Product: Blender (https://whatsnew.fyi/product/blender)
- Vendor: Blender Foundation
- Date: 2025-09-09
- Original notes: https://store.steampowered.com/news/app/365670/view/529856925490219088
- Permalink: https://whatsnew.fyi/product/blender/releases/2025-09-09-blender-4.5.3-lts-maintenance-release

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Memory leak when loading libraries fails from Python
- **fixed** — Grease Pencil smooth sculpt brush not working with handles and mask
- **fixed** — Add-on hotkey customizations not saved for custom operators
- **fixed** — Frozen mathutils Vector & Matrix types could be resized
- **fixed** — UVSculpt brush size not converted correctly for 5.0 changes
- **fixed** — bpy.context.object.modifiers["Lineart"].thickness no longer works in 4.5.2
- **fixed** — Grease pencil divide blend mode doesn't work
- **fixed** — Vulkan submission runner crash on start
- **fixed** — NVIDIA driver 580.76.05 on Wayland freezes at startup with Vulkan backend
- **fixed** — Material compilation errors directly lead to Blender crashing with Vulkan backend
- **fixed** — Blender Light Probes do not create mirrors in 4.5 with Vulkan enabled
- **fixed** — Missing display update for unified strength icon
- **fixed** — Crash selecting text on a linked duplicated text object
- **fixed** — Crash with Cycles render with persistent data and fileview thumbnails sequence
- **fixed** — Vulkan weird pink shading with temporal accumulation turned off
- **fixed** — Crash switching camera from Camera View to Orthographic view in Material Preview mode
- **fixed** — EEVEE rendering incorrect in walk mode with overscan enabled
- **fixed** — Cycles OSL node with external script does not update
- **fixed** — Invalid text selection in the Python console
- **fixed** — Illegal address in CUDA queue copy_from_device

Blender 4.5.3 LTS features important bug fixes. It is released on the _v4.5 - Stable - LTS_ branch.  You can switch to this by **right-clicking** on the **Blender** entry in your library, select **Properties...**. Open the **Betas** tab and select **v4.5 - Stable - Stable**.

##### Patch Notes

* [4.5 LTS] Fix memory leak when loading libraries fails from Python. ([0056783a60d11e9eb20d5fbe73d4535989871b02](https://projects.blender.org/blender/blender/commit/0056783a60d11e9eb20d5fbe73d4535989871b02))
* Fix: Grease Pencil: Smooth sculpt brush not working with handles and mask. ([b1b7360fc2543212c63b66be89536dacae38cce1](https://projects.blender.org/blender/blender/commit/b1b7360fc2543212c63b66be89536dacae38cce1))
* Add-on hotkey customizations are not saved for custom operators. ([#143838](https://projects.blender.org/blender/blender/issues/143838))
* [4.5 LTS] Fix: frozen mathutils Vector & Matrix types could be resized. ([3bb0b4864df761bb3d2db593eea8b5a9ffa797e8](https://projects.blender.org/blender/blender/commit/3bb0b4864df761bb3d2db593eea8b5a9ffa797e8))
* Fix: UVSculpt brush size not converted correctly for 5.0 changes. ([f2c538ae863025869deb9bb3201a4a9bbb32ea56](https://projects.blender.org/blender/blender/commit/f2c538ae863025869deb9bb3201a4a9bbb32ea56))
* bpy.context.object.modifiers["Lineart"].thickness no longer works in 4.5.2. ([#145138](https://projects.blender.org/blender/blender/issues/145138))
* Grease pencil: Divide blend mode doesn't work. ([#143802](https://projects.blender.org/blender/blender/issues/143802))
* Fix: Vulkan: Submission runner crash on start. ([baa7ba7cbee894d034a59b309923a444b1a1f52c](https://projects.blender.org/blender/blender/commit/baa7ba7cbee894d034a59b309923a444b1a1f52c))
* Vulkan: NVIDIA driver 580.76.05 on Wayland freezes at startup. ([#144625](https://projects.blender.org/blender/blender/issues/144625))
* When using the Vulkan backend, material compilation errors directly lead to Blender crashing. ([#144614](https://projects.blender.org/blender/blender/issues/144614))
* Blender Light Probes do not create "mirrors" in 4.5 with Vulkan enabled. ([#142110](https://projects.blender.org/blender/blender/issues/142110))
* Missing display update for unified strength icon. ([#144281](https://projects.blender.org/blender/blender/issues/144281))
* Crash selecting the text on a linked duplicated text object. ([#144970](https://projects.blender.org/blender/blender/issues/144970))
* 4.5 Crash with Cycles render w/ Persistent Data + fileview thumbnails sequence. ([#143662](https://projects.blender.org/blender/blender/issues/143662))
* Fix: Workbench: Broken render tests after AA fix. ([df9239608bbc21f23b233c65b2eba6898ada9f18](https://projects.blender.org/blender/blender/commit/df9239608bbc21f23b233c65b2eba6898ada9f18))
* Fix: Workbench: Broken render tests after AA fix. ([df9239608bbc21f23b233c65b2eba6898ada9f18](https://projects.blender.org/blender/blender/commit/df9239608bbc21f23b233c65b2eba6898ada9f18))
* Cycles: Add ROCm 7 runtime to hipew search list. ([f6c709f30b23be4fa9618938c2bb3c052a74421d](https://projects.blender.org/blender/blender/commit/f6c709f30b23be4fa9618938c2bb3c052a74421d))
* Cycles: Add support for building with CUDA 13.0 and OptiX 9.0. ([6f6bf2b64d5c8cdec7fb5927fe41eca3818be8ce](https://projects.blender.org/blender/blender/commit/6f6bf2b64d5c8cdec7fb5927fe41eca3818be8ce))
* Vulkan: Weird pink shading with temporal accumlation turned off. ([#144636](https://projects.blender.org/blender/blender/issues/144636))
* Crash switching camera from Camera View to Orthographic view in Material Preview mode. ([#143857](https://projects.blender.org/blender/blender/issues/143857))
* EEVEE: Rendering is incorrect in walk mode with overscan enabled. ([#144441](https://projects.blender.org/blender/blender/issues/144441))
* Fix #144599: Cycles OSL node with external script does not update. ([#144808](https://projects.blender.org/blender/blender/issues/144808))
* Invalid text selection in the Python

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