Unreal Engine Issues
Unreal Engine Issues
Data validation FAILED due to IWBE_Blutility containing invalid data
UE - Content - Engine - Jan 11, 20214.26[AssetLog] D:\Binary\UE_4.26\Engine\Content\Tutorial\InWorldBlueprintEditing\TutorialAssets\IWBE_Blutility.uasset: Default__IWBE_Blutility_C is not valid. See the MapCheck log messages for detai ...
Chaining AutomationTool Commands leads to an endless loop
UE - Foundation - Cpp Tools - Automation Tool - Nov 23, 2022Repro Rate: 3/3 This issue was reproduced in //UE5/Release-5.1 at CL 23058290. This is confirmed to not be a regression since the error also occurs on the previous live version. This is regression ...
Material Editor Viewport does not display World Position Offset
UE - Rendering - Graphics Features - Mar 19, 2026The preview Viewport in the Material Editor does not correctly render World Position Offset. It appears that the RenderVelocities pass (which is also drawing the depth for the preview sphere) does ...
Instanced Static mesh does not LOD at the same screen distance as standalone mesh
UE - Graphics Features - Nov 11, 2014DESCRIPTION: When using instanced static mesh component in a blueprint that has LODs the normal distances for LODs are not reflected for the instanced static mesh component. AH Post: https://answe ...
Refresh rate for windowed package builds causes frame stuttering
UE - Graphics Features - Aug 24, 2017THere is an issue where the refresh rate of a windowed packaged game does not match the refresh rate of a monitor correctly, this results in stuttering. This issue does not occur in the editor (PIE) ...
Visual flicker occurs with object during play
UE - Graphics Features - Sep 5, 2017There is an issue occurring where objects are flickering, and what appears to be jittering at set distances when rendering, increasing the bounds of the mesh pushes the distance for the issue out. T ...
Child Blueprint construction script runs before parent C++ OnConstruction
UE - Gameplay - Jun 25, 2019When the order of construction is backwards it makes it impossible to have native objects set up components in OnConstruction, that a child BP Construction Script then has access to. Sometimes the C ...
Compiled MayaLiveLink plugin for Maya-2018 under Linux crashes Maya
OLD - Anim - Aug 27, 2019User is trying to use the Maya Live Link plugin on Linux with Maya 2018. They tried to modify the MayaLiveLinkPlugin.cpp because there is no possible way to compile the plugin under linux with uintp ...
Param usage bug when using switch params
UE - Rendering - Architecture - Materials - Mar 28, 2022From the ticket: In a material instance using the attached master material if A is TRUE and B is FALSE I expect to be able to configure param C in the UI. However param C is shown only when Useswi ...
When the WidgetInteraction component hovers over the Button of the Control component, executing the Press Pointer Key causes any ongoing Input operations to force their "Completed" operation
UE - Gameplay - Input - Jan 9, 2023Reproduced 3/3 times, issue does not occur in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed Regression. Other Notes:Any ongoing Input operations gets forced to their "Completed" operation I cr ...