Unreal Engine Issues
Unreal Engine Issues
Animation timeline shows black when only animating the opacity of a widget (regardless of the the color setting in that widget)
UE - Anim - Sequencer - Jul 13, 2015This is something that needs to be solved at the color track level in sequencer, we need to be showing current values in place of 0,0,0 for the things that are not animated. When animating just the ...
Setting multiple identical actors to replicate movement will crash on PIE with multiple players
UE - Networking - Jan 28, 2015If ten or more of the same actor in a level have the "replicate movement" checkbox set to true, the editor will crash on PIE if the number of players is set to 2 (or with 1/2/3 players if dedicated ...
Velocity Scene Texture Data Integrity Issues
UE - Graphics Features - Jan 8, 2026When a Post-Process Material uses the Scene Texture Material Expression, the following code is generated: ``` MaterialFloat2 Local0 = Parameters.TexCoords[0].xy; MaterialFloat2 Local1 = ClampSceneT ...
UE5 Main - Editor crashes when creating a Data Table
UE - Editor - Workflow Systems - Feb 14, 2022Doesn't occur in UE5 Release or UE4.Can't attach logs/crash information I'm encountering an RHI crash within UE5 Main at the moment. This issue seems to be caused by a commit from last year that ...
[CrashReport] UE4Editor_Engine!FTextureCacheDerivedDataWorker::BuildTexture() [texturederiveddata.cpp:772]
UE - Graphics Features - Feb 20, 2017Error message: Access violation - code c0000005 (first/second chance not available) Source Context:757 if (SourceMips.Num()) 758 { 759 FFormatNamedArguments Args; ...
GAS PlayMontageAndWait: Server applies root motion with wrong scale at last montage tick
UE - Gameplay - Gameplay Ability System - Apr 3, 2024User reported: when playing an AnimMontage via GameplayAbility with the PlayMontageAndWait ability task that has a custom value for AnimRootMotionTranslationScale, (dedicated) servers can apply an i ...
Crash from generated Merged Actor with no created lightmap UV
UE - Gameplay - Nov 11, 2016If you import a static mesh with no setup lightmap and uncheck the option for Generate lightmap UV so that only the UV Channel 0 is present. When you use the Merge Actor tool with a single one of th ...
[Feature Request] Cook in the Editor should only save Asset Registry for the cook target platform
UE - Foundation - Core - Cooker - Jan 18, 2018Request from Licensee: When launch Launching in the editor, it seems that asset registries of platforms other than those specified in Launch are also generated. LogAssetRegistryGenerator: Startin ...
Paper2D performance regression due to TArray resizing
UE - Graphics Features - Aug 16, 2019We've noticed after upgrading our heavy Paper2D project to 4.22 that tilemap performance has been massively degraded compared to previous versions. After some digging we found out that it's due to a ...
Crash when Dragging Skeletal Mesh with Apex Clothing into Level
UE - Simulation - Physics - Character - Nov 29, 2016A crash occurs when you add/drag a skeletal mesh with Apex clothing into the scene. The user reporting the issue managed to find where the crash occurs and added a comment for assistance where to lo ...