Unreal Engine Issues

[CrashReport] UE4Editor_Engine!UModelComponent::CommitSurfaces() [modelcomponent.cpp:163]

This is a somewhat common crash that has existed since at least 4.14.. It appears related to an Undo operation on geometry. User DescriptionsUndoing a move of a boxbrush wall and staircaseundoing i ...

Contact shadows bug in splitscreen

Screen Space shadows do not check the view boundary. This can cause extra shadows in split screen, as one view can cast shadows in another view. ...

UDIM textures have default Tiling Method set to Wrap but causes incorrect filtering on edges.

UDIM textures have default Tiling Method set to Wrap but causes incorrect filtering on edges. It should be set to Clamp or Mirror by default. ...

SpringArmComponent with "Use Camera Lag Substepping" does not handle fluctuating frame rates correctly

The description of SpringArmComponent's "Use Camera Lag Substepping" option says "sub-step camera damping so that it handles fluctuating frame rates well". However, as noted and explained by a licen ...

Calling SetupAttachment/AttachToComponent with 'this' as the parent inside a USceneComponent subtype's C++ ctor for nested component subobjects will result in all instances of the nested default subobject trying to attach to the CDO at registration time.

This occurs because the 'AttachParent' property is a UPROPERTY, and as a result when we create a new instance of a USceneComponent subtype, any USceneComponent subtypes it owns are treated as instan ...

Action event in the blueprint graph leads to state dirty.

BP state get dirty if the BP graph have action input event. Regression: Yes, it is not reproduced in 4.16.3 This issue is not related to Blueprint Compilation Manager. ...

GAS: RemoveReplicatedLooseGameplayTag on unadded tag causes it to be replicated

A UDN user found that calling AbilitySystemComponent->RemoveReplicatedLooseGameplayTag(TagToRemove); while the gameplay tag was not in the TagMap, will create an entry for it with count 0, see ...

FMediaFoundationMovieStreamer::Init() returns true even if the movie could not open.

[CrashReport] UE4Editor_Engine!FUniformExpressionSet::CreateUniformBuffer() [materialuniformexpressions.cpp:382] - IterateOverActiveFeatureLevels

No user comments ...

UWorld::GetNetMode returns incorrect value during UGameInstance::StartPlayInEditorGameInstance

During PIE instance initialization, there seems to be a window during which UWorld::GetNetMode will not return the expected value: before the instance's NetDriver has been created but after UGameIns ...