Unreal Engine Issues

Lumen Leaking and Reflection Flickering

FMaterialResource::IsTangentSpaceNormal default value behaves differently whether material uses material attributes

A UDN user has reported that a difference in appearance between two identical materials with the only difference that one uses material attributes. I have boiled down the issue to FMaterialResource ...

Cooked materials and material instances size have doubled when upgrading from 5.1.0 to 5.2.0

UDN: [Link Removed] A UDN customer has observed that their cooked materials have doubled in asset size going from 5.1 to 5.2. We need to investigate this is only a local issue on their side and no ...

Interchange tests framework need to support python pipeline

Post Process Materials After the Upsampler Have Incorrect ViewUniformBuffer Information

A proposed solution to this has been given by the licensee, please see the related UDN. ...

Delay when entering text into EditableText using Microsoft IME after switching between half-width and full-width characters

When adding text after switching from half-width to full-width input using Microsoft IME, there may be a delay of about 3 seconds before the text can be entered correctly. This is supposed to occur ...

Component Visualizer EndEditing() never called in Blueprint viewport

User reports difference in ComponentVisualizer behaviour between level viewport and blueprint editor viewport. Details and repro in the referenced UDN ticket. ...

In the Anim Sequence Editor set a Notify's MontageTickType to be fixed to BranchingPoint if that Notify is a Native Branching Point

To avoid confusing users when working with a Native Branching Point Notify set its MontageTickType to be fixed to BranchingPoint.  ...

SceneQuery: UWorld::SweepSingleByChannel doesn't return BoneName on skeletal meshes with per-poly collision enabled

Scene queries when encountering skeletal meshes with per-poly collision enabled do not return a bone name in the HitResult. Returning the BoneName always or having it as an option via FCollisionQuer ...

OnObjectPropertyChanged Firing Excessively when FText is Bulk Edited

If multiple game objects are selected at once and their text field is edited, instead of getting N events, it produces N-squared events. It looks like FPropertyHandleBase::SetPerObjectValue is call ...