Unreal Engine Issues

Setting replicated TArray in PostLoad prevents repnotify from being called

See linked UDN for more details and a sample project reproducing the issue. The issue seems to be that the object's archetype doesn't have any changes made to the array in PostLoad, so the shadow st ...

Ray tracing in sequencer causing AO ghosting

Static mesh components spawned in the UCS along a spline require lighting to be rebuilt after a map reload.

Seems to be somehow related to components being instanced in the Construction Script according to a spline. The transforms are slightly off by more than 1.e-2f. They are reconstructed on load with a ...

[Feature Request] Artists want "importing fbx chunks" functionality back in chaos fracture.

Some artist customers want a tool to customize fractured mesh in chaos fracture just like the functionality "import fbx chunks" in APEX destruction, that could give them more controllability of the ...

Overriding a subobject's class in a native base class can lead to that component being null in derived Blueprints (FObjectInitializer::SetDefaultSubobjectClass)

Overriding a subobject's class in a native base class can lead to that component being null in derived Blueprints.  ...

Child blueprint classes do not inherit "ClassGroup" from their native parents

When creating a blueprint component based off of a custom native class that utilizes the ClassGroup metadata  ...

Significant editor slowdowns when moving blueprinted actors while having a different complex blueprint open

A Blueprinted actor's construction script time can be affected by the complexity of an opened level Blueprint. ...

"If" node in materials causing striped artefacts when passing "Material Attributes"

Shader compilation error occurs when using values sampled from texture for Customized UV1

Shader compilation error occurs when using values sampled from texture for Customized UV1.　No problem when connected to Customized UV0. This problem compiles well if I change the value of Const to ...

Nanite meshes swap materials during simulation

When enabling nanite on Quixel Bridge assests.  Materials sometimes randomize to other assets in the viewport during simulation or PIE.  This does not occur every time and may take a few tries.   T ...