Unreal Engine Issues
Unreal Engine Issues
Live Coding Doesn't Appear to Correctly Reload or Reinit Automation Spec Tests
UE - Foundation - Cpp Tools - Live Coding - Dec 3, 2020Something in the way that live coding interacts with the test system, or how the tests are loaded at startup and initialized, isn't quite matching up. ...
WasRecentlyRendered() and GetLastRenderTimeOnScreen() still triggers when a skeletal mesh re-enters the view frustum despite being occluded.
UE - Rendering Architecture - Dec 4, 2024AActor::WasRecentlyRendered() and UPrimitiveComponent::GetLastRenderTimeOnScreen() both still trigger when a skeletal mesh (occluded behind a wall) re-enters the player's view frustum after being ou ...
Steam VOIP will drop packets with more than two people talking at once
UE - Online - Oct 5, 2016VOIP has a limited amount of concurrent clients talking before packets start to get dropped. ...
Crash can occur in the Ansel plugin when setting Use Client Side Camera Updates to false in Player Camera Manager
UE - Graphics Features - Apr 18, 2017Setting the `bUseClientSideCameraUpdates` property in a `PlayerCameraManager` class to false can result in a crash in the Ansel plugin because `GEngine->GameViewport` may be NULL. Another user has ...
Lightmass: Blocky lightmap artifacts appears on the Mesh Actor which is shadowing by a single face mesh
UE - Graphics Features - Lumen - Jun 9, 2020Begin Map Begin Level Begin Actor Class=/Script/Engine.StaticMeshActor Name=Plane_2 Archetype=/Script/Engine.StaticMeshActor'/Script/Engine.Default__StaticMeshActor' Begin Object Class=/Script/En ...
Overriding a struct member field's default value on a BP-added component in a BP asset will no longer allow the user to edit that struct member on instances of that BP's component if the member is deprecated.
UE - Framework - Blueprint - Oct 19, 2023Properties that are deprecated are (incorrectly) not currently being propagated to instances by the duplication logic that we use to instance BP-added components as part of Actor-based BP constructi ...
Particles: SetFloatParameter not always having an effect
UE - Graphics Features - Oct 7, 2015A licensee is trying to use Distribution Float Particle Parameters for the Noise properties of a Beam Particle. When trying to change these parameters in a Blueprint, some work, others don't. When ...
Mouse Position Lags behind Cursor in Editor if Framerate Drops
Tools - Mar 9, 2016Mouse position lags behind cursor in editor if framerate drops. This can be especially problematic for individuals who quickly select assets as the mouse position may lag behind the cursor location ...
Skeleton mesh with hair strands material will lead to unnecessary draw call submissions
UE - Graphics Features - Mar 27, 2025Materials with "Used With Hair Strands" enabled will cause Skeletal Meshes to draw twice in the Base Pass. ...
The number of elements in an array remain the same as the default when duplicating an actor
UE - Gameplay - Blueprint - Feb 22, 2017If a user removes elements from an array in an instance of that blueprint in the level and then duplicates the actor (in the level ) containing the array, then the resulting actor will have the orig ...