Double to float conversions of time in renderer causes precision issues

UE - Rendering - Architecture - Materials - Apr 8, 2026

In game sessions when the value for world time becomes large enough we start running into floating point precision issues. These issues can easily be seen in materials which do periodic animation b ...

FVoiceSerializeHelper doesn't add references to AudioComponent instances

UE - Networking - Apr 28, 2015

"FVoiceSerializeHelper doesn't add references to AudioComponent instances" ShooterGame crashes when following the repro steps provided by the licensee, listed below and on the UDN post. Crash image ...

KiteDemo: Landscape without collision - Out of Bounds

Docs - Samples - May 4, 2017

While testing in KiteDemo - //UE4/Release-4.16 CL 3420042 in Binary – trying to find the limits of the Caution: Out of Bounds UMG, I found a landscape static-mesh that did not have collision. ...

Level Instance: failed check in duplication code when embedding

UE - World Creation - Worldbuilding Tools - Level Instances - Aug 2, 2021

Mentioned in this UDN is the possibility that duplication of some actor fails because their BP as been deleted.  ...

Subtitle settings are ignored after editor restart

UE - Editor - UI Systems - Localization - Nov 11, 2016

If the Subtitles Enabled setting is set to false, subtitles will still display after restarting the editor regardless of Subtitles Forced Off setting. ...

Construct object fails to assign a value when using the level blueprint - ConstructObject node issue

UE - Gameplay - Blueprint Compiler - Feb 28, 2018

https://udn.unrealengine.com/questions/419239/uk2node-genericcreateobject-compile-issue.html ...

USD Stage window doesn't update when selecting other USDStageActors

UE - Editor - Content Pipeline - Import and Export - Jul 31, 2020

Toggling between USD Stage Actors does not update the USD Stage window with the information from the selected USD Stage. Only the information from the last loaded USD Stage Actor is present. ...

Calling a Multicast RPC from a Player Controller creates a new Player Controller on the Client

UE - Networking - Jun 3, 2015

Calling a Multicast RPC from a Player Controller creates a new Player Controller on the Client. In 4.7.6, this results in a repeating log warning: "LogPlayerController:Warning: Calling IsLocalContro ...

[CrashReport] UE4Editor_Landscape!FLandscapeVertexFactoryVertexShaderParameters::SetMesh() [landscaperender.cpp:3137]

UE - LD & Modeling - Terrain - Landscape - Feb 27, 2018

No user comments in crash group 3127 if (SectionLodsParameter.IsBound()) 3128 { 3129 if (CurrentLODData.UseCombinedMeshBatch) 3130 { 3131 Set ...

Crash when closing the editor during Play if a web browser widget is in use

UE - Editor - UI Systems - Nov 17, 2016

Crash when closing the editor during Play if a web browser widget is in use. A web browser was added to the screen during Play in Editor. After this the editor is close via the [X] in the upper righ ...