Unreal Engine Issues

Ribbon Particle Normals are reversed from default Sprite Particles

It appears that the Vertex Normals from Ribbon Particles are opposite of what is expected via the Default Particle System given both systems share the same alignment (Facing Camera) [Image Removed] ...

While mouse dragging a Spinbox Widget, it cannot be edited once the player's focus is lost (calling: Set Input Mode)

The Spinbox Widget cannot be edited if the Player's focus is lost. I have tried using different keyboard letter inputs in the Blueprints and have gotten the same results. ...

Duplicating an inherited Blueprint float variable defaults it's value to 0.

When creating an Actor Blueprint (Testbase), and creating a new Blueprint Actor that inherits from Testbase (TestBP).  We can drag an instance of TestBP into the World. If we go back into the Parent ...

UProceduralMeshComponent::UpdateMeshSection does not call UProceduralMeshComponent::UpdateCollision

Updating a procedural mesh results in an incomplete collision update. Collision bounds appear to get updated properly, but collision data is not updated, despite a navigation rebuild being triggered ...

Landscape cooked heightmap and Physical Material mismatch

Several users have reported crashes where the Heightfeild loaded from the DDC and physical material list do not match. Suggest adding the number of physical materials to part of the cooked heightma ...

One-off Crash after Hot-reload compile from Editor

The compile toast notification read that it was successful, then the Editor crashed about 10 seconds later. Error Message in Crash Reporter: Access violation - code c0000005 (first/second chance n ...

Tilemaps with masked materials respond to lighting at incorrect directions

Tilemaps using lit methods of rendering are subject to strange lighting behavior. If the material for the tilemap is using a 'masked' method of rendering.  Lighting will appear at incorrect angles. ...

sending Console command by EmitCommand in Pixel Streaming doesn't work

Able to set default values for Sequence & Map variables for a Movie Pipeline Executor Job causing an Ensure & Crash

Able to set default values for Sequence & Map variables for a Movie Pipeline Executor Job causing an Ensure & Crash. Repro Rate: 4/4 Tested this in //UE4/Release-4.27 @ CL#18319896 and the user is ...

USDStage - USD Material Overrides not reading

USD material overrides do not get applied properly to a USDStage prim inside UE.     When a material override that is set to a parent prim of USD Material, the override is ignored.   A usd material ...