Unreal Engine Issues
Unreal Engine Issues
3D Grass may not appear in Path Tracer renders
TM - Rendering - Sep 19, 2025Reported in SF [Link Removed] Path Tracer renders of images with 3D grass may not display 3D grass in the foreground of an image. The 3D grass material will not appear or may appear to cut off at s ...
Gameplay Tag Query - Assert when changing root expression while tag picker is open
UE - Editor - UI Systems - Slate - Jun 17, 2021Changing a gameplay tag query's root expression in a make query node will assert if the tag editor widget is open. ...
Ensure condition failed: !TagRedirects.Contains(OldTagName) Renaming Gameplay Tag twice
UE - Gameplay - Jul 6, 2017It appears the ensure only happens once. Cannot get the ensure to happen once Project Settings is closed. This also occurs in 4.16.2 so it is not a regression ...
Copy, Paste and Hover a Material Layer Blend Node causes Crash
Tools - Jun 25, 2015In the Material Editor, if all Live Previews are turned off, copying and pasting a Material Layer Blend Node will crash when the tool tip is being processed. Also Reproduced in Main Promotable-CL-2 ...
UnrealHeaderTool is always executed in a Code Project from an InstalledBuild
UE - Foundation - Cpp Tools - UnrealBuildTool - Apr 23, 2019UnrealHeaderTool is always executed in a Code Project from an InstalledBuild Discovered during the verification of [Link Removed], as stated when verifying that issue, this issue only occurs in Bin ...
Enabling Allow Client Side Navigation results in a NavMesh Needs To Be Rebuilt error message on the Client
UE - AI - Dec 7, 2015Enabling Allow Client Side Navigation results in a NavMesh Needs To Be Rebuilt error message on the Client. The Client cannot use the nav mesh. This is a regression: this did not occur in 4.9.2 (th ...
Imported animation has one more frame than the original fbx
OLD - Anim - Jul 19, 2016In UE4.12, imported animation has one more frame than the expected frame number. AS_AN_StepAnim_Test.fbx is 60 frame long animation(starts at frame 0, ends at frame 60). When imported to UE4.12, it ...
Warnings displayed when launching the editor in DX12
UE - Graphics Features - Oct 6, 2016Following warning is displayed in the log when launching in dx12:[2016.10.06-22.33.36:185][ 0]LogD3D12RHI:Warning: Root signature created where the root parameters take up 18 DWORDS. Using more tha ...
Destructible meshes created with PhysXLabs will not cast shadows
UE - Simulation - Physics - Destruction - Jan 30, 2015When importing destrucitble APB asset files from PhysX Labs there is no visible shadow cast for these meshes. The same is not true for a destructible created in UE4. These are using the default sett ...
Crash Occurs on Project Load When Casting a Child Actor Component's Parent to the Parent Class
UE - Gameplay - Blueprint - Dec 5, 2016A crash is occurring on project load when attempting to use GetParentActor and cast that to a Parent class that contains a child actor component inside of that child actor component's blueprint. T ...