# Blender Blender 5.2.1 LTS Maintenance Release !

- Product: Blender (https://whatsnew.fyi/product/blender)
- Vendor: Blender Foundation
- Date: 2026-08-25
- Original notes: https://store.steampowered.com/news/app/365670/view/717913919982667333
- Permalink: https://whatsnew.fyi/product/blender/releases/2026-08-25-blender-5.2.1-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** — VSE: Cannot prefetch sequencer-input scene strips
- **fixed** — VSE: Clear cache of seq-input scene strips when modifying their contents
- **fixed** — Geometry Nodes: Evaluating Empty Bundle List Crashes
- **fixed** — VSE: Strip Keyframe animations in nested scenes don't play
- **fixed** — Ctrl+Z after adding packed data Corrupts & Crash node group references when linked assets of it is present
- **fixed** — Crash in Armature Edit mode after duplicating animated bone
- **fixed** — Transmission passes are empty for objects using materials that have 'thin wall' ticked
- **fixed** — EEVEE: Avoid resetting sampling every frame
- **fixed** — All Grease Pencil Fill Strokes automatically drawn with Cyclic enabled
- **fixed** — Resource leak in bpy.app.timers return value
- **fixed** — Resource leak accessing BMesh MLoop Color
- **fixed** — libraries.load swapped set_fake & recursive arguments
- **fixed** — Memory corruption passing options to keyframe_delete
- **fixed** — Memory leak looking up collections with an allocated key
- **fixed** — Out-of-bounds read passing name keywords to GPUShaderCreateInfo
- **fixed** — VSE: Color strips are width,height = 1,1 when added via .new_effect(...)
- **fixed** — VSE: Incorrect text selection/cursor draw and interaction when mirrored
- **fixed** — VSE: Video/Image strips render in a different place than the preview if origin is not default and render scale is not 100%
- **fixed** — Cycles: Hydra render delegate broken by ray visibility refactor
- **fixed** — Cycles: Hydra use-after-free deleting light and geometry

Blender 5.2.1 LTS features important bug fixes. It is released on the _v5.2 - 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 **v4.5 - Stable - Stable**.

##### Patch Notes

* Fix: VSE: Cannot prefetch sequencer-input scene strips. ((https://projects.blender.org/blender/blender/commit/b23c7b0ecf6))
* Fix: VSE: Clear cache of seq-input scene strips when modifying their contents. ((https://projects.blender.org/blender/blender/commit/cf00b767b2d))
* Geometry Nodes: Evaluating Empty Bundle List Crashes. ([#161263](https://projects.blender.org/blender/blender/issues/161263))
* VSE: Strip Keyframe animations in nested scenes don't play. ([#160310](https://projects.blender.org/blender/blender/issues/160310))
* Ctrl+Z after adding packed data Corrupts & Crash node group references when linked assets of it is present. ([#161243](https://projects.blender.org/blender/blender/issues/161243))
* Fix: crash in Armature Edit mode after duplicating animated bone. ([53e5197bd12](https://projects.blender.org/blender/blender/commit/53e5197bd12))
* Transmission passes are empty for objects using materials that have 'thin wall' ticked. ([#161434](https://projects.blender.org/blender/blender/issues/161434))
* Fix #161352: EEVEE: Avoid resetting sampling every frame. ([#161445](https://projects.blender.org/blender/blender/issues/161445))
* All Grease Pencil Fill Strokes automatically drawn with Cyclic enabled. ([#161666](https://projects.blender.org/blender/blender/issues/161666))
* Fix: resource leak in bpy.app.timers return value. ((https://projects.blender.org/blender/blender/commit/f050f72d912))
* Fix: resource leak accessing BMesh MLoop Color. ([48e45c7e6ca](https://projects.blender.org/blender/blender/commit/48e45c7e6ca))
* Fix: libraries.load swapped "set_fake" & "recursive" arguments. ((https://projects.blender.org/blender/blender/commit/ff796a8a9c0))
* Fix: memory corruption passing "options" to keyframe_delete. ([747f26cd8bb](https://projects.blender.org/blender/blender/commit/747f26cd8bb))
* Fix: memory leak looking up collections with an allocated key. ([88c5ecc87cc](https://projects.blender.org/blender/blender/commit/88c5ecc87cc))
* Fix: out-of-bounds read passing "name" keywords to GPUShaderCreateInfo. ((https://projects.blender.org/blender/blender/commit/e92e62f1966))
* B 5.2.0 LTS - VSE regression - color strips are width,height = 1,1 when added via .new_effect(...). ([#161468](https://projects.blender.org/blender/blender/issues/161468))
* Fix: VSE: Incorrect text selection/cursor draw and interaction when mirrored. ([108164e3a53](https://projects.blender.org/blender/blender/commit/108164e3a53))
* VSE: Video/Image strips render in a different place than the preview if origin is not default and render scale is not 100%. ([#161421](https://projects.blender.org/blender/blender/issues/161421))
* Fix: Only invoke the crash handler once. ((https://projects.blender.org/blender/blender/commit/f6b140636b3))
* Fix: Cycles: Hydra render delegate broken by ray visibility refactor. ((https://projects.blender.org/blender/blender/commit/b8e7006f2ee))
* Fix: Cycles: Hydra use-after-free deleting light and geometry. ((https://projects.blender.org/blender/blender/commit/ce04740de22))
* Fix: Cycles: Hydra uses unsupported GPU when driver is outdated. ((https://projects.blender.org/blender/blender/commit/ae399326c0d))
* Fix: Cycles: Poor texture cache initialization time with many tiles. ([5a22b7e930b](https://projects.blender.org/blender/blender/commit/5a22b7e930b))
* Cycles: Use minimum 64x64 tile size for texture cache load. ((https://projects.blender.org/blender/blender/commit/c0372c3a3f1))
* Fix: exception changing a Python custom property to data-block type. ([3ef70069ede](https://projects.blender.org/blender/blender/commit/3ef70069ede))
* Change in custom property from string to numerical results in exception. ([#161438](https:

_[Truncated at 4000 characters — full notes: https://store.steampowered.com/news/app/365670/view/717913919982667333]_