Multiple water body blend modes produce unexpected results

UE - Graphics Tools - Terrain - Water - Sep 16, 2022

LandscapeExportWeightmapToRenderTarget not implemented

UE - Graphics Tools - Terrain - Landscape - Sep 6, 2022

LandscapeExportWeightmapToRenderTarget is not implemented:bool ALandscapeProxy::LandscapeExportWeightmapToRenderTarget(UTextureRenderTarget2D* InRenderTarget, FName InLayerName) { returnfalse; } ...

[AI] Debug Render Scene Proxy hits ensure for registering a delegate twice during level streaming.

UE - AI - Debugging - Aug 31, 2022

Description from licensee: We're seeing an ensure get tripped up in FDebugRenderSceneProxy that says "DrawDelegate is already Registered!". Debugging the issue, we have confirmed that the DrawDeleg ...

Breaking level instances does not adequately fix up actor references

UE - World Creation - Worldbuilding Tools - Level Instances - Aug 29, 2022

Details in link. ...

Crash when dragging and dropping sub-level Actors into HLOD Outliner

UE - World Creation - Worldbuilding Tools - HLOD - Aug 25, 2022

In 4.27.2 a new cluster is created without any problem. ...

FBX animations generated under fractional framerates fail to import

UE - Anim - Runtime - Aug 24, 2022

We now have the following error that is generated in FFbxImporter::ValidateAnimStackif (!FMath::IsNearlyZero(SubFrame, KINDA_SMALL_NUMBER) && !FMath::IsNearlyEqual(SubFrame, 1.0f, KINDA_SMALL_NUMBER ...

Physical Material Masks do not work in non-editor builds

UE - Simulation - Physics - Aug 12, 2022

Physical material masks are not working as expected in cooked builds. Licensee reports that the mask data is empty at runtime. ...

Editor-only blueprints like WidgetBlueprint are not added to cooked asset registry class hierarchy

UE - CoreTech - Aug 10, 2022

Both the Asset Registry and Asset Manager look for all subclasses of UBlueprintCore and use that to search for blueprint classes and construct an inheritance hierarchy. This always works in editor b ...

Lumen generates gradated shading even if the light is a constant color sky light

UE - Graphics Features - Lumen - Jul 22, 2022

Lumen generates a gradated shading even if objects are lit by a 360-degree constant sky light.[Link Removed][Link Removed] I looked into this and found that this comes from Spherical Harmonics int ...

Undoing Level visibility change causes levels moves to wrong world origin offset

UE - World Creation - Worldbuilding Tools - Jul 21, 2022