FDeferredDecalProxy cannot be initialized to not fade even if FadeDuration is set to 0

UE - Rendering - Architecture - May 16, 2024

FDeferredDecalProxy always fade because InitializeFadingParameters is always called and leaves InvFadeDuration at 1.0 and the LifetimeAlpha calculation in FDeferredDecalPS::SetParameters gets a very ...

Conditional crash when a DragAndDrop operation is done betweeen Data Layers.

UE - World Creation - Worldbuilding Tools - Data Layers - May 8, 2024

A crash occurs to the engine as when we when have unreal as a backgroud task, and we try to drag and drop a layer to another by selecting the layer visibility button. ...

Material not compiling due to WorldAlignedTexture connected to multiply

UE - Rendering - Architecture - Materials - Jul 23, 2024

When a WorldAlignedTexture node is connected to multiply and then to a base color output, the material cannot be compiled, giving an error about an undeclared local variable "Local27". Does not happ ...

EnumRedirections from a Blueprint enum to a c++ enum does not redirect everything correctly.

UE - Core - Systems - Aug 20, 2024

There is an engine bug when using the EnumRedirects feature inside a config file. If we have a Blueprint Enum used in our blueprints, and we want to convert all the Blueprint enum references to a C+ ...

Nanite can assert in ValidateFixupChunk: 'Assertion failed: HierarchyNodeIndex < Resources.NumHierarchyNodes'

UE - Graphics Features - Nanite - Aug 29, 2024

Reported by a licensee. More discussion in the linked UDN case. "Sometimes the WorldPartitionBuilderCommandlet will fail after encountering this error:" Error: Assertion failed: HierarchyNodeIndex ...

Crash during garbage collection when container UPROPERTIES specify raw interface pointer element types without TScriptInterface wrapper

UE - Core - Cpp Tools - UnrealHeaderTool - Oct 1, 2024

When a UPROPERTY() TMap or TArray has raw interface pointers as element type, the garbage collector tries to handle them and crashes. For raw interface pointers without a container, UHT generates a ...

GTAO console command minor issues

UE - Graphics Features - Oct 18, 2024

The following ambient occlusion console commands have issues: r.AmbientOcclusion.Compute ? The help text state it only works console but it also works on PC and likely other platforms. r.GTAO.Use ...

Null Material Layers in Material Instances cause Opacity Mask and WPO to break on Nanite Meshes

UE - Rendering - Architecture - Materials - Oct 31, 2024

When a Material Instance is loaded that has a nullptr layer in StaticParametrs.Materiallayers.  The Material Instance will create it's own CachedExpressionData but the ConnectedParameterMask will be ...