# Blender Blender 4.2.15 LTS Maintenance Release !

- Product: Blender (https://whatsnew.fyi/product/blender)
- Vendor: Blender Foundation
- Date: 2025-10-29
- Original notes: https://store.steampowered.com/news/app/365670/view/516350567072665166
- Permalink: https://whatsnew.fyi/product/blender/releases/2025-10-29-blender-4.2.15-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** — Glare Node from 4.5.x LTS crashing 4.2.x LTS when switching to Compositor Editor
- **fixed** — VSE Metastack channel preview with negative values
- **fixed** — Crash when switching view layer after undoing deleting or unlinking of certain object types
- **fixed** — Cycles MetalRT motion curves setup bug
- **fixed** — Blender crashes when using Align Bones operator across two armatures with different mirror settings
- **fixed** — NoneType object is not subscriptable error in follow active quads operator on non-manifold geometry
- **fixed** — Crash after using UV Sculpt Tools in new scene
- **fixed** — Crash when deleting library from which the current scene is linked
- **fixed** — Keyframe position wrong when pasting after changing clip start in NLA
- **fixed** — Sequencer crash with sequencer in sequencer
- **fixed** — VSE Swap Data breaks strip alignment and then crashes
- **fixed** — Setting sequence channel to a negative index causes crash

Blender 4.2.15 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

* Tools: Add cleaner of bpy install folder for wheel. ((https://projects.blender.org/blender/blender/commit/ec25ae240a6))
* Glare Node from 4.5.x LTS will immediately crash 4.2.x LTS once you switch to Compositor Editor. ([#145896](https://projects.blender.org/blender/blender/issues/145896))
* Fix: VSE: Metastack channel preview with negative values. ([2c97ac8785](https://projects.blender.org/blender/blender/commit/2c97ac8785))
* Crash when switching view layer after undoing deleting/unlinking of certain object types. ([#145848](https://projects.blender.org/blender/blender/issues/145848))
* Fix: Cycles: MetalRT motion curves setup bug. ([#146568](https://projects.blender.org/blender/blender/issues/146568))
* Blender crashes when using the Align Bones operator across two armatures with different mirror settings. ([#146242](https://projects.blender.org/blender/blender/issues/146242))
* "'NoneType' object is not subscriptable" error in "follow active quads" operator, on some non-manifold geometry. ([#132734](https://projects.blender.org/blender/blender/issues/132734))
* 4.2.5 LTS - 5.0.0 alpha: Crashing after using UV Sculpt Tools in New Scene. ([#145879](https://projects.blender.org/blender/blender/issues/145879))
* Crash deleting library from which the current scene is linked. ([#147759](https://projects.blender.org/blender/blender/issues/147759))
* Animation: Keyframe position is wrong when pasting after changing clip start in the NLA. ([#138695](https://projects.blender.org/blender/blender/issues/138695))
* Sequencer: crash with sequencer in sequencer. ([#147477](https://projects.blender.org/blender/blender/issues/147477))
* VSE: "Swap Data" breaks strip alignment, then crashes. ([#146682](https://projects.blender.org/blender/blender/issues/146682))
* Setting sequence channel to a negative index causes crash in 4.2 LTS. ([#141659](https://projects.blender.org/blender/blender/issues/141659))

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

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

Happy blending,
The Blender team