Unreal Engine Issues
Unreal Engine Issues
Foliage lightmaps for LODs does not look correct
UE - World Creation - Worldbuilding Tools - Foliage - Jun 21, 2016When using the foliage tool with any mesh that has a LOD the lightmap generates artifacts for the instance. The base LOD will have correct looking lightmaps, however when pulling back and seeing the ...
Packaging fails after changing from Dynamic to Static Nav Mesh Runtime Generation
UE - AI - Feb 8, 2016If you package with Runtime Generation set to Dynamic and then switch to Static and attempt to repackage, the packaging will fail with the following error message.[2016.02.08-16.18.14:511][217]MainF ...
Controller::OnPossessedPawnChanged broadcasts (Pawn->null) but not (null->Pawn) during AGameModeBase::RestartPlayer()
UE - Gameplay - Sep 17, 2025Context AController has a blueprint assignable delegate that fires when the possessed pawn changes. This should fire in both singleplayer and networked games. The bug is reproducible in single play ...
Crash: Direct3DDevice->CreateBuffer failed at D3D11VertexBuffer.cpp with error E_INVALIDARG
UE - Graphics Features - Jul 6, 2017This is a common crash affecting users since at least the 4.14 release. It was previously associated with [Link Removed], however that has been marked as fixed. Source Context 221 void Veri ...
"REFLECTION CAPTURES NEED TO BE REBUILT" is displayed on a cooked game.
UE - Graphics Features - Lumen - Jul 29, 2020This issue occurs when streaming levels including reflection captures are displayed with delay. When it finishes loading assets, reflection capture textures are uploaded to the GPU. Then the leve ...
Add Chunks button in asset audit tool does not function because of name compare problem
UE - Editor - Content Pipeline - Content Browser - Aug 5, 2020The Asset Audit window uses the content browser to display information about both real assets and fake assets like chunk definitions. When you hit the Add Chunks button, it adds several fake assets ...
check(!bPostTickComponentUpdate) fails triggered by ~FStaticMeshComponentBulkReregisterContext() and FD3D12DynamicRHI::ProcessInterruptQueueUntil()
UE - Gameplay - Components - Jul 23, 2024Context: Some ActorComponents can schedule end-of-frame work which UWorld executes later in the frame in UWorld::SendAllEndOfFrameUpdates(). By-design it appears that it's not allowed to schedule mo ...
SplineMeshComponent's collision will start to distort the longer the Spline becomes
UE - Gameplay - Nov 30, 2016SplineMeshComponent's collision will start to distort the longer the Spline becomes This is a regession. It was working in 4.13.2-3172292 User Description: When drawing out a long spline mesh ( r ...
Data loss caused by C++ Child Actor Component when compiling Child BP
UE - Gameplay - Blueprint - Dec 22, 2016Having Child Actor Components that are set in code can cause data loss upon compiling the blueprint. In this particular scenario, there are two custom Actor classes involved, MainActor and SubActo ...
If remove the muted side from the two child tracks in sequencer, the remaining tracks will be muted forever
UE - Anim - Sequencer - Feb 4, 2022The cause was that the information remained in Rows Disabled of Track even though it returned to one Track by the delete operation from the state where there was a child Track of multiple rows. As ...