Unreal Engine Issues
Unreal Engine Issues
The GetCombinedForces put out wrong value when the vehicle is reversing
UE - Simulation - Physics - Aug 19, 2022Reproduced 3/3 times. A similar bug occurred with PhysX ([Link Removed]) Check the function: FVector FSimpleAerodynamicsSim::GetCombinedForces(float VelocityIn) if the velocityIn is negative, th ...
Engine freezes when Level Sequence format is in seconds
UE - Anim - Sequencer - May 22, 2023When using the jumpbox with a sequence that is in seconds (not fps) the engine will freeze. This issue is occurring in Binary //UE5/Release-5.2 @ CL 25360045 This issue is occurring in Binary //UE ...
Details Panel - USTRUCTS do not save their expansions properly
UE - Editor - Workflow Systems - Oct 6, 2023Currently USTRUCTS do not support saving expansions properly. While we won't implement a separate pathway for USTRUCTS to save their expansions, a general solution to save expansions for class or st ...
Regression: FGameplayTag and FGameplayTagContainer pin value modification is not undo/redoable
For nodes with an FGameplayTag or FGameplayTagContainer pin, when changing the tag value (Pin->DefaultValue) and triggering Undo/Redo, the pin modification is not undone. Rather, it undoes the previ ...
ExportMaterialUVDensities() gets the incorrect value where the alpha channel is referenced
UE - Rendering Architecture - Materials - Apr 16, 2024ExportMaterialUVDensities() gets the incorrect value where the alpha channel is referenced (e.g. RegisterIndex of the texture is [3] or [7]) because FMeshRenderer::RenderMaterialTexCoordScales() use ...
Cloth Asset - Cloth bounces off wildly during the rendering of a sequence in MRQ.
UE - Simulation - Physics - Character - Jun 26, 2024The motion blur rendering is causing some issues when rendering the cloth asset as the timestep wildly changes without the number of substeps being increased, The movie pipeline code needs to man ...
Editor crash after reverting a Blueprint asset in source control
UE - Framework - Blueprint Compiler - Feb 26, 2025Added context from dev support ticket:The crash occurs because FDelegateProperty::Serialize accesses a dangling SignatureFunction pointer. Given that its derefencing dangling pointers the specifi ...
MetalRHI Asserts When Using "Profile GPU" With RHI-Thread/Parallel-Execution
UE - Graphics Features - Sep 14, 2016When the RHI thread is enabled (with or without parallel-execution) for Metal it isn't currently possible to run "profilegpu" because the GPU timestamp emulation code isn't multi-thread safe and pro ...
AddTimedDisplay causes crash when changing level
UE - Gameplay - Dec 8, 2022RemoveAfterSecondsLambda in AddTimedDisplay function may access released memory during level transitions. The following workaround works : void UViewportStatsSubsystem::AddTimedDisplay(FText Text, ...