# Blender Blender 4.2.13 LTS Maintenance Release !

- Product: Blender (https://whatsnew.fyi/product/blender)
- Vendor: Blender Foundation
- Date: 2025-08-20
- Original notes: https://store.steampowered.com/news/app/365670/view/529855657693675536
- Permalink: https://whatsnew.fyi/product/blender/releases/2025-08-20-blender-4.2.13-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'.

---

- **fixed** — OpenVDB cache Mantaflow Gas has Hollow Emission
- **fixed** — Cycles Render: Volume (Before Baked Simulation Starts) still trying to be rendered
- **fixed** — Crash displaying negative numbers in WM_cursor_time
- **fixed** — Only last tangents layer is exported to fbx when mesh has multiple uv layers
- **fixed** — Crash adding subsurf with invalid material indices
- **fixed** — Crash selecting an armature with over 65k objects
- **fixed** — Ctrl + H Hide Other Collections Pie Menu – Shift to Extend Not Working
- **fixed** — Vertex Weight Proximity sets Normalize Weights checkbox to default state after options switch
- **fixed** — Dyntopo detail size drawing with Shift + D seems broken
- **fixed** — Removing and then redefining override causes a crash
- **fixed** — execute_node_group only accepting positive values for arguments
- **fixed** — Blender crashes opening certain file
- **fixed** — Regression: ASAN heap-use-after-free crash when pasting node group after undoing or opening a new file

Blender 4.2.13 LTS features important bug fixes. It is released on the _v4.2 - 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 **v4.2 - Stable - LTS**.

##### Patch Notes

* OpenVDB cache Mantaflow Gas has Hollow Emission. ([#91174](https://projects.blender.org/blender/blender/issues/91174))
* Cycles Render: Volume (Before Baked Simulation Starts) still trying to be rendered. ([#105546](https://projects.blender.org/blender/blender/issues/105546))
* 4.2 backport: Fix: crash displaying negative numbers in WM_cursor_time. ([cf4c65d8d6e65579777c3e0ab6db0fb422332ade](https://projects.blender.org/blender/blender/commit/cf4c65d8d6e65579777c3e0ab6db0fb422332ade))
* Fix: Only last tangents layer is exported to fbx when mesh has multiple uv layers. ((https://projects.blender.org/blender/blender/commit/b40856b76d7))
* Crash adding subsurf with invalid material indices. ([#142245](https://projects.blender.org/blender/blender/issues/142245))
* Crash selecting an armature with over 65k objects. ([#143161](https://projects.blender.org/blender/blender/issues/143161))
* Cleanup `bpy` builds on PyPI and archive them on Download. ([#146](https://projects.blender.org/infrastructure/meta/issues/146))
* Ctrl + H "Hide Other Collections" Pie Menu – Shift to Extend Not Working. ([#140548](https://projects.blender.org/blender/blender/issues/140548))
* Vertex Weight Proximity sets Normalize Weights checkbox to default state after options switch. ([#143360](https://projects.blender.org/blender/blender/issues/143360))
* Nuked my C: drive accidentally using Blender. ([#139585](https://projects.blender.org/blender/blender/issues/139585))
* Dyntopo detail size drawing with Shift + D seems broken. ([#83623](https://projects.blender.org/blender/blender/issues/83623))
* Removing and then redefining override causes a crash. ([#144373](https://projects.blender.org/blender/blender/issues/144373))
* Fix: execute_node_group only accepting positive values for arguments. ([26d3ea18beb](https://projects.blender.org/blender/blender/commit/26d3ea18beb))
* Blender crashes opening certain file. ([#144749](https://projects.blender.org/blender/blender/issues/144749))
* Regression: ASAN `heap-use-after-free` crash when pasting node group after undoing or opening a new file. ([#141415](https://projects.blender.org/blender/blender/issues/141415))

For a detailed list of bug fixes in each release, see [ 4.2 LTS releases on blender.org](https://www.blender.org/download/lts/4-2/)

##### LTS Program

Learn more about the [LTS program on blender.org](https://www.blender.org/download/lts/)

##### Stay up-to-date

You can follow Blender on social media:

Keep reporting any issues you find to make this LTS the most stable release ever !

Happy blending,
The Blender team