Unreal Engine Issues
Unreal Engine Issues
Sequencer - When a subsection has negative play rate, any nested sub-subsections fail to evaluate
zComponent - Archive - Jul 3, 2025Consider a sequence hierarchy with more than two layers. If the top-level sequence uses a negative timescale on a sub-sequence, the contents inside it animate as expected, but any nested sub-sequenc ...
FOnlineExternalUISteam::ShowWebURL doesn't react correctly to URLs with http:// as the protocol
UE - Networking - Dec 17, 2015Code for this function below:bool FOnlineExternalUISteam::ShowWebURL(const FString& WebURL) { if (!WebURL.StartsWith(TEXT("https://"))) { SteamFriends()->ActivateGameOverlayT ...
Vive: Trigger haptic has a low chance to not play
UE - Platform - XR - Feb 17, 2018Occasionally the haptics will not response to a trigger pull on the vive wands. It's about 2/15 will skip response. ...
Stereo off while prox sensor uncovered causes low framerate
UE - Platform - XR - Mar 7, 2017Inputting 'Stereo Off' while the prox sensor is uncovered will disable stereo rendering but introduces large performance decrease. Stat FPS returns constant 10 FPS / 100 ms. Found on: //UE4/Release ...
VolumetricFog does not update + creates artefacts in low exposure environments
UE - Rendering - Features - Jul 26, 2022See licensee video here which shows the issue - [Link Removed] ...
VR Preview crash when shadow quality is set to low
UE - Platform - XR - Dec 5, 2024[/Script/Engine.RendererSettings] r.Tonemapper.Sharpen=2 r.TemporalAA.Upsampling=False r.DefaultFeature.AutoExposure.ExtendDefaultLuminanceRange=True r.LightPropagationVolume=0 r.ReflectionCaptureRe ...
Dropdown selection box jitters when mouse is moved over top of it on Mac
Tools - Jan 6, 2017This is a regression as it does not occur in 4.14.3 at CL 3248269 Update chris.wood: I think this might be a wobble caused by floating point errors in SMenuAnchor::Tick() ...
Low res textures (MobileContentScaleFactor) on iPad Pro 10.5"
UE - Platform - Mobile - Jul 31, 2017There's no device profile to set MobileContentScaleFactor for iPadPro 10.5". It picks up other rendering settings properly from the iPadPro family, but this doesn't set MobileContentScaleFactor. T ...
Low-level memory tracking has negative values for "FMallocUnused" and "Untracked"
UE - Foundation - Core - Oct 6, 2020"FMallocUnused" is immediately bellow 0. "Untracked" is reported to go below 0 after very long playtimes (over 36 hours). Reported in version 4.25.3(CL 13942748). Tested and found negative values f ...
Runtime Virtual Texture samples at low precision for very large volumes
UE - Rendering - Architecture - May 31, 2022When using a runtime virtual texture with a resolution of greater than 2^24 we can start to see a lack of precision in sampling when the sampling UVs get closer to 1. To see this we need to be usin ...