Unreal Engine Issues
Unreal Engine Issues
LIVE: Code projects using TextureRenderTarget2D will not build because UTextureRenderTarget is undefined in TextureRenderTarget2D
UE - Foundation - Core - Nov 5, 2014If a TextureRenderTarget2D is used in a code class, the build of the project will fail with an error stating that the UTextureRenderTarget base class is undefined. The line #include "Engine/TextureR ...
Cascade pooled emitters are not reclaimed on disabled LODs
UE - Niagara - Aug 30, 2019Pooled memory will not be reclaimed from emitters with disabled LODs if Disabled LODs Keep Emitter Alive is checked. ...
TArrayView64 RangeCheck prints the incorrect error messages for values over 32-bit length
UE - Core - Systems - Apr 29, 2022TArrayView64 RangeCheck prints the incorrect error messages for values over 32 bit. Repro Rate: 4/4 Tested this in //UE4/Release-4.27 @ CL#18319896 and the issue did occur there, it is not a regre ...
Editing InlineEditConditionToggle variable value causes editor to crash
Tools - Oct 7, 2016Editing property with InlineEditConditionToggle meta specifier causes the editor to crash. Workaround: Calling Super::PostEditChangeProperty after property changing code prevents crash from occurri ...
Trying to set/change an element of a fixed-size TAssetPtr array in the Editor results in a crash.
UE - Foundation - Core - Dec 9, 2016Trying to set the value of an element of a fixed-size TAssetPtr array in the Editor results in the Editor crashing. This did not occur in 4.13. The attached callstack is from debugging the project ...
Black flickering on Mesh particles when the Renderer is set to a non-default Facing Mode or using Orient Mesh to Vector and when using Particle Position in the Material's WPO
UE - Niagara - Jul 23, 2020Black flickering on Mesh particles when set to a non-default Facing Mode or using Orient Mesh to Vector and when using Particle Position in the Material's World Position Offset ...
Default values specified for local BP variables of type DateTime and Timespan don't actually work
UE - Gameplay - Blueprint Runtime - Nov 6, 2020Have attached examples of this in action, including breakpoints showing the FDateTime::Ticks count as zero. Also showed that this is an issue for the existing GetYear/GetMonth/GetDay methods (and an ...
Images Rendered out by Movie Render Queue has much more visible Banding issue in gradient
zComponent - Archive - Aug 21, 2021I did some experiment locally. At very first I thought it's the image compression issue, since the issue is also obvious while rendered out images as JPG and PNG, there's no image compression qualit ...
Crash when duplicating component with Instanced property initialized with CreateDefaultSubobject
UE - Framework - Feb 2, 2024An editor crash can be observed when copy-pasting an actor with an actor component with an instanced object property when set to a non-default value. Detailed steps to reproduce are provided below. ...
Mass entities initializing fragments on the incorrect archetypes due to shared CreationContext
UE - Engine Scaling - Mass - Feb 3, 2026UMassAgentSubsystem::HandlePendingInitialization creates a single FEntityCreationContext that is reused across all iterations of the PendingAgentEntities loop. When SpawnEntities eventually calls in ...