Unreal Engine Issues

VSM SMRT SamplesPerRay CVars behave differently if groom assets are present leading to a potential full-scene shadow

When a groom is present, setting any SamplesPerRay SMRT CVar to zero results in an unexpected complete shadow projected from the light. ProjectLight() in VirtualShadowMapProjection.usf has addition ...

GetMouseX returns stuttering value if ShowMouseCursor is enabled

Showing the mouse cursor and holding down the left mouse button while dragging will cause the MouseX event to broadcast incorrect axis values.  ...

AO Decals not working when using Lumen

When lumen enabled, and with static lighting disabled, we expect the Material AO to contribute to diffuse lighting occlusion. However AO from decals does not have any effect. ...

[Legacy][FBX] Animation curves are not added to the skeleton anymore

UV Offset Effect Material in RetainerBox Causes Visual Artifacts in Editor Preview

When a UV Offset is applied in a RetainerBox effect material, visual artifacts appear only in the editor — not at runtime — if a widget with a dotted preview outline (like CanvasPanel) is placed dir ...

When painting on a landscape with edit layers, there are UV distortions happening across the boundaries of paint layers when material is using SetMaterialAttributes

Context Landscape Edit Layers enables users to paint landscapes using non-destructive layers, and can add multiple layers to the landscape that can be edited independently from each other. Problem ...

Converting a modular character to a static mesh can result in a crash or in an asset with corrupted data

Foliage rendering issues when using both Density Scaling and MaxWorldPositionOffsetDisplacement

When a material with WPO effects and MaxWorldPositionOffsetDisplacement is applied to a foliage mesh, foliage applied to a map will no longer work as expected with density scaling, especially after ...

Priority order of texture parameters on post process material instances is inverted

The texture parameters on material instances applied to post process volumes do not respect the priority order of the post process volume, and are in fact inverted relative to the priority of other ...

Crash in NaniteStreamManager when Nanite data fails to decode corrupt data from DDC

If Nanite data becomes corrupt in the DDC, the Editor may crash in FStreamingManager::InstallReadyPages() when the Pending.State is FPendingPage::EState::DDC_Ready but the resulting SrcPtr is null b ...