Unreal Engine Issues
Unreal Engine Issues
Changing the object being debugged while stopped at a breakpoint has no long term effect if there was no object selected at the start of the breakpoint
UE - Gameplay - Blueprint Editor - Sep 30, 2019The issue is that when we hit a breakpoint with no 'object to debug' set, we will set a flag bResetObjectBeingDebuggedWhenFinished to true, so after you resume execution we'll clear that flag and fo ...
Build lighting for single stationally light level generates a shadow map in PF_B8G8R8A8 format
UE - Texture - Nov 1, 2024Texture format override to BGRA8 due to changes in CL-30603716. The following code can restore the previous behavior. void FShadowMapPendingTexture::StartEncoding(ULevel* LightingScenario, ITexture ...
Actor variable type has distractingly large tooltip comment
UE - Gameplay - Blueprint Editor - May 4, 2021Actor.h has a large comment that describes the entire lifecycle of Actors, which was written for the API website (https://docs.unrealengine.com/en-US/API/Runtime/Engine/GameFramework/AActor/index.ht ...
GAS: FGameplayAbilitySpecHandle lacks invokable serialize function
UE - Gameplay - Gameplay Ability System - Dec 15, 2023FGameplayAbilitySpecHandle is a struct that can be replicated by-design to identify a granted GameplayAbility in server-client communication. This works fine with default struct replication using FR ...
ALevelVariantSetsActor not exposing Actor tags
UE - Editor - Content Pipeline - Variants - Nov 22, 2024Hi, while trying to workaround this: https://udn.unrealengine.com/s/question/0D54z00008kTgHCCA0/variant-manager-crash-in-upropertyvaluehasvalidresolve I thought I would not create variant sets act ...
Importing through Python fails
UE - Editor - Content Pipeline - Import and Export - Feb 20, 2019Version 4.21:The script result in popping the Alembic Import windows instead of a silent importThe provided options are ignored by the importer. Version 4.22: Results in the provided callstack wi ...
Replicated component destruction not reaching client
UE - Networking - Aug 31, 2021See the attached UDN for more information and a sample project reproducing the issue. This issue seems to happen due to a specific order of events. First, the component is destroyed, and garbage col ...
Packed Level Actors will create ISMs with inverted normals when a portion of static meshes have negative scales. This is apparent with two-sided materials.
UE - World Creation - Worldbuilding Tools - Feb 17, 2025Packed level actors will create ISM instances with inverted normals when the selection of meshes used to create the packed level actor contains a subset of meshes with negative scales. This is the ...
Performance slowdown when ray tracing is disabled due to SetResidencyPriority
UE - Rendering - Architecture - RHI - Jul 17, 2025When a game is compiled with ray tracing disabled (D3D12_RHI_RAYTRACING=0) and the GPU the game is running on becomes low on VRAM, frame time is negatively impacted and doesn't recover. The D3D12_RH ...
LIVE: Setting sg.EffectsQuality between values will reset Destructible meshes if they have fractured
UE - Simulation - Physics - Destruction - Nov 14, 2014DESCRIPTION: Using the command line sg.EffectsQuality and setting a value will reset a destructible mesh if it has already been fractured. AH Post: https://answers.unrealengine.com/questions/12850 ...