Unreal Engine Issues
Unreal Engine Issues
Chaos Trailing Events not exposed to Blueprints and only accessible via Niagara Chaos DI
UE - Simulation - Physics - Destruction - Apr 22, 2025Chaos Trailing Events not exposed to Blueprints and only accessible via Niagara Chaos DI. The licensee noticed that the Trailing event is not available to BPs. It's expected that the same data avail ...
Inconsistent parameter handling for pak/iostore block size / patch padding
UE - CoreTech - IoStore - Apr 14, 2025Users have trouble overriding the blocksize/patchpaddingalign parameters for UnrealPak from UAT commandlines.There is no easy way to specify these parameters through a buildcookrun, instead they n ...
Modifiers do not behave as expected when adding conflicting mappings of different priorities
UE - Gameplay - Input - Apr 11, 2025Bug when loading an external project that also exists in the uprojectdirs
UE - Content - Sample - Apr 8, 2025When launching the editor for the "external\foreign" project, the code in GetEngineAndProjectAbsoluteDirsFromExecutable ends up superseding the path returned from {{FPlatformMisc::ProjectDir() }} wi ...
[Legacy][FBX] Animation curves are not added to the skeleton anymore
UE - Editor - Content Pipeline - Import and Export - Jan 17, 2025SetActorLabel() is slow on Landscapes
UE - Graphics Tools - Terrain - Landscape - Jan 7, 2025I've noticed calling SetActorLabel() on a Landscape will call PostEditPropertyChanged() which causes the Landscape Components to regenerate all collisions. As per the repro, this can take a long tim ...
VisualizeTexture with the BMP flag causes a crash when any mip over mip0 is requested
UE - Rendering Architecture - Dec 18, 2024When a mip level higher than 0 is requested in VisualizeTexture, the engine will crash. The root cause appears to be VisualizeTexture.cpp:924, on which an incorrect mip level is used to read a non-m ...
Diffing blueprints in Perforce changelist reviewer incorrectly displays blueprints that reference assets not in local filesystem
UE - Framework - Blueprint - Nov 22, 2024When diffing a blueprint in the Perforce changelist reviewer in-editor (Review Changelists), if the blueprint references an asset that does not exist locally but rather exists as a newly added asset ...
ALevelVariantSetsActor not exposing Actor tags
UE - Editor - Content Pipeline - Variants - Nov 22, 2024Hi, while trying to workaround this: https://udn.unrealengine.com/s/question/0D54z00008kTgHCCA0/variant-manager-crash-in-upropertyvaluehasvalidresolve I thought I would not create variant sets act ...
Shadow Maps performance issue with 5.4 in comparison towards 5.3
UE - Graphics Features - Shadows - Nov 20, 2024Shadow depths performance for non-VSM in certain scenes, notably those with rect lights and meshes that are set to movable, went from ~2ms to ~18ms going from UE 5.3 to UE 5.4. Setting the movable a ...