Unreal Engine Issues
Unreal Engine Issues
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 ...
Gameplay Effects can hold stale references to GameplayTags when switching Gameplay Effect Component type
UE - Gameplay - Gameplay Ability System - Jan 9, 2024Gameplay Effects can hold stale references to Gameplay Tags when the adding component is switched for a different type. The tags are serialised, and their presence can be confirmed with Reference Vi ...
Crouching/Uncrouching while standing on a physics object will cause the object to behave erratically
UE - Gameplay - Sep 7, 2016Crouching/Uncrouching while standing on a physics object will cause the object to behave erratically. Even if the CharacterMovement component has Physics Interaction disabled, it will still effect t ...
Masked TwoSided material causing lumen direct lighting to leak through walls
UE - Graphics Features - Lumen - Apr 23, 2024It appears that LumenScene's Hardware Ray Tracing is causing light leaking into a sealed room (which should be perfectly black). This bug does not appear to happen on AMD GPUs. ...