Unreal Engine Issues
Unreal Engine Issues
Instanced Actors: PCG on RuntimeGrid "None" assigns created IAManagers RuntimeGrid "MainGrid", causing cross-grid reference
UE - World Creation - Procedural Tools - PCG Graph - May 30, 2026Context PCG can be used to spawn Instanced Actors via the PCG IA Interop plugin, that makes Spawned Instanced Actors available as node. When a PCGActor placed in the level runs a PCG graph that spa ...
Material expression If node has been broken, major regression that shipped in 4.6
UE - Graphics Features - Dec 9, 2014This sounds legit. Anyone mess with the if node recently? There seems to be a regression where existing content is broken. This should be fixed ASAP and patched into 4.6. https://forums.unrealen ...
MaterialTextureScale calculated incorrectly for materials with WorldPositionOffset
UE - Rendering - Architecture - Materials - Apr 16, 2024When a Material uses WorldPositionOffset, the MaterialTextureScale is calculated incorrectly because FMaterialUtilities::ExportMaterialUVDensities() calls FMeshRenderer::RenderMaterialTexCoordScales ...
Using a FormatText node with Specifier in the same graph as an empty Macro will freeze the editor
UE - Gameplay - Blueprint - Jun 17, 2016Using a FormatText node with Specifier in the same graph as an empty Macro will freeze the editor. Not using the Specifier or deleting the unused Marco will allow the BP to compile fine. **Only rep ...
[CrashReport] UE4Editor_CoreUObject!FWeakObjectPtr::operator=() [weakobjectptr.cpp:28]
UE - Anim - Sequencer - Nov 3, 2016This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Error message: Access violation - code c0000005 (first/second chance not available) Source C ...
Multiple Materials not assigned to Mesh on Import
UE - Editor - Content Pipeline - Import and Export - Jan 6, 2017Not all material elements are created and assigned to the static mesh using multiple materials. With the attached mesh, only the first element is created and the other two are left non-existent. I c ...
Each adding a static mesh not containing any collision data keeps increasing PhysX memory
UE - Simulation - Gameplay - Apr 19, 2021If the static mesh has UseSimpleCollisionAsComplex and does not have any SimpleCollision shapes, The physics actor will be destroyed immediately in FInitBodiesHelperBase::CreateShapesAndActors, but ...
Ambient occlusion causing ghosting for animations when viewport is resized on DX11
UE - Rendering - Graphics Features - Feb 10, 2025Tested regression against //UE5/Release-5.4 @ CL35576357 and the issue did not occur. This is a confirmed regression.[Image Removed] Jira Bot attaches conversation thread from Slack [Image Removed]D ...
TextRenderComponents not parallel safe. Can cause crash
UE - Graphics Features - Feb 28, 2017Licensee has reported intermittent crashes when loading a map that contains Child Actors with Text Render Components. When the child actor blueprint is spawned all of the text render components st ...
UE4 Crashes if multiple Vive Trackers or Lighthouses are used
UE - Platform - XR - Jan 24, 2018User reports that if more than 5 trackers are connected, UE4 crashes Suggested fix: Root cause of bug is related to the fact that UE has no setup to receive input events from Vive Trackers. (we ha ...