Adding multiple streaming levels to the world in a single frame can potentially exceed time slicing budget

UE - Gameplay - Feb 17, 2020

If a level uses most of the time slicing budget but not all, the next level in the list will begin to load and could potentially use the full time slicing budget. In the worst case scenario, you cou ...

Load Stream Level action doesn't trigger out execution pin if the level is invalid

UE - Gameplay - Feb 14, 2020

As a user I would expect the out execution pin of the LoadStreamLevel node to fire even if the level failed to load.  ...

Get Niagara Emitter Vec3 Attrib Results in Hard Crash

UE - Niagara - Feb 14, 2020

Also tried it out by replicating the setup in an Actor blueprint with the same result. ...

Ambient Occlusion decals ignore Receive Decals setting on meshes

UE - Graphics Features - Feb 13, 2020

Adding an ambient occlusion decal material to a decal affects objects with "Receives Decal" disabled. Tested in: 4.23.1 CL#9631420 4.25 CL#11341939 ...

Landscape Grass scale not applied when min and max are same value

UE - World Creation - Worldbuilding Tools - Foliage - Feb 13, 2020

If min and max scale are the same in a LandscapeGrassType asset, scale will not be applied. Confirmed in 4.25 MAIN @ CL 11318998 ...

ProRes and Avid DNx do not use tokens in their file names when rendering from Sequencer

UE - Anim - Sequencer - Feb 12, 2020

The plugin media formats do not account for tokens in the filename. ...

Native struct types that declare one or more non-UPROPERTY fields are not initialized with the default value from a modified Blueprint CDO.

UE - Gameplay - Blueprint - Feb 12, 2020

Dynamically-spawned instances of a Blueprint class go through an optimized property initialization pass (see UBlueprintGeneratedClass::BuildCustomPropertyListForPostConstruction() and InitProperties ...

Sprite fails to edit based on UV Source Texture Region, when attempting to bulk edit via Bulk Edit Property Matrix.

UE - Gameplay - Paper2D - Feb 12, 2020

Sprite fails to edit based on UV Source Texture Region, when attempting to bulk edit via Bulk Edit Property Matrix.  User was following along to this Epic tutorial: [Link Removed] However, the e ...

D3D12RHI crash when interacting with UI using dx12 with raytracing enabled

UE - Graphics Features - Feb 12, 2020

Enabling raytracing and DirectX12 results in D3D12RHI crash when interacting with the UI or console inside of the editor.  User is using the latest drivers and has adequate hardware to run raytraci ...

Crash when reimporting staticmesh fail

UE - Editor - Content Pipeline - Import and Export - Feb 12, 2020

When a re import fail, we currently delete the package which in a reimport case produce a crash later. If a reimport fail we should abort and make sure the asset is not touch and exactly like it wa ...