Unreal Engine Issues

XboxOne D3D12 Graphics Artifacts

Multiple licensees are experiencing this problem. The repro should look like this initially: [Image Removed] But then over time will degrade overtime into something like this this, most likely cau ...

Editor crash when drag and drop the Image widget in a NamedSlot on the designer

When first added as a child widget in NamedSlot, the child widget can be dragged and dropped onto the parent widget's designer. The following assert causes a crash. Assertion failed: ParentWidget ! ...

MoviePipeline skipped frames using Temporal Subsampling + Time Dilation

The frame appears to be getting skipped entirely, but the timing for the frames on either side of them is correct, ie: if frame 10 is skipped, frame 9 and 11 still match the working case, so the ove ...

FFT corruption in bloom from sampling outside of viewport

Licensee has suggested a fix: "Switching to >= resolves the problem: in GPUFastFourierTransform2DCore.ush, `bool InWindow = ...` at lines 127, 144, 170, and 185." ...

HDR is washed out or broken across multiple platforms

Default HDR images look incorrect for different reasons on each platform: PC SDR:[Image Removed] PC HDR:[Image Removed] ...

If Material is not overridden, Material will not be exported correctly.

This is because FFbxExporter::ExportStaticMeshToFbx() does not correctly determine the OverrideMaterials.  Therefore, the following code will not pass.else { Material = StaticMesh->GetMaterial(P ...

MipLevel sample mode doesn't work as expected in Adaptive RVT

ISM Component in an instanced BP does not take into account changes to NumCustomDataFloats from the BP class

PerInstanceSMCustomData is bulk serialized and doesn't get changed on the BP instance when changing NumCustomDataFloats, possibly causing out of bounds array access leading to a crash. Possible sol ...

Dormancy validation log warnings when COND_Never property changes

FRepLayout::DiffProperties doesn't check if the property's conditions is COND_Never or if the Parent Cmd's flags have the ERepParentFlags::IsLifetime flag (which FRepLayout::InitFromClass doesn't se ...

WatchEnumProperty() node failing to find Enum property in tool property set

Within a UEditorScriptableClickDragTool tool, when attempting to watch the changes of an UENUM property using WatchEnumProperty() node, the property will never be able to be found during FindValid ...