Unreal Engine Issues

Blueprint Struct associations in Blueprint hierarchy causes command line cooker to crash

If a user creates a specific Blueprint hierarchy with a Blueprint struct, it can cause a issue when the Blueprint struct is being cooked. User description of Blueprint(s) and Blueprint Struct relat ...

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. ...

Inherited component properties on actor instances of derived blueprints are silently reset to defaults when the blueprint enters a compile error state and is subsequently fixed

When an instance of a child blueprint in a level enters the “Bad Blueprint” state due to a compile error it will reset to default values when it is restored after the compile error has been fixed. ...

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