# Editor crash (unhandled assert) when changing blend mode on a material assigned to a Nanite static mesh

**URL:** <https://forums.unrealengine.com/t/editor-crash-unhandled-assert-when-changing-blend-mode-on-a-material-assigned-to-a-nanite-static-mesh/2764048>\
**Category:** Issues and Bug Reporting (Unreal Engine)\
**Tags:** unreal-engine, closed\
**Created:** [September 9, 2026, 6:12pm UTC](https://forums.unrealengine.com/t/editor-crash-unhandled-assert-when-changing-blend-mode-on-a-material-assigned-to-a-nanite-static-mesh/2764048 "2026-09-09T18:12:48Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Bug-Reporter](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/bug-reporter/32/997076_2.png) [@Bug-Reporter](https://forums.unrealengine.com/u/Bug-Reporter)\
**Post date:** [October 23, 2026, 3:01pm UTC](https://forums.unrealengine.com/t/editor-crash-unhandled-assert-when-changing-blend-mode-on-a-material-assigned-to-a-nanite-static-mesh/2764048/3 "2026-10-23T15:01:13Z")

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UE-405757 has been ‘Closed’ as a duplicate of an existing known issue. Origin Issue: UE-393900, Origin Topic: [Unreal Crashes 5.81](https://forums.unrealengine.com/t/unreal-crashes-5-81/2746230)

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