Unreal Engine Issues

Duplicate subobjects when you attach to an OptionalDefaultSubobject

I believe that this is happening because of a problem within USubobjectDataSubsystem::FindOrCreateAttachParentForComponent where it is creating duplicates of the character mesh because the "TestScen ...

Properly handle child actor component referencing Level Instance actor

Material fails to compile when virtual texture is connected to opacity mask only through Make/Break Material Attributes

If we connect a virtual texture to the opacity mask output of a material the material will fail to compile. Currently this is expected because allowing it could cause problems such as:No virtual tex ...

Editor crash after unload a data layer

Blueprint context menu doesn't list function calls for array properties

Possibly one of the lesser know features of Blueprints is that we allow the connection of an array of actors to the "self" pin of a function (see pic). This is essentially a shorthand for writing an ...

Runtime Virtual Texture samples at low precision for very large volumes

When using a runtime virtual texture with a resolution of greater than 2^24 we can start to see a lack of precision in sampling when the sampling UVs get closer to 1. To see this we need to be usin ...

When using OpenLevel to transition to a level with WorldPartition enabled during PIE, the log outputs "Failed to load '/Game/MapName': Can't find file."

Outputs warning logs when transitioning to the World Partition level with OpenLevel. This only occurs in PIE, not in Standalone or Package builds. In PIE, it appears that the package failed to load ...

Only the first image of multi-source SVT can be exported.

[Debug Tools][Crash] - Enabling au.editor.ForceAudioNonStreaming causes editor to crash the next time the user PIEs

Encountered while going through some debug commands. Repro 3/3. Crash Reporter Link: [Link Removed]Assertion failed: ChunkIndex != 0 [File:E:\User\Engine\Source\Runtime\Engine\Private\AudioStreaming ...

VRS doesn't respect the AdditionalShadingRatesSupported flag

D3D12 needs to check the flag D3D12_FEATURE_DATA_D3D12_OPTIONS6::AdditionalShadingRatesSupported and filter out VRS modes that aren't supported. This flag should be put into something like "GRHISupp ...