Unreal Engine Issues

Passing array from blueprint to C++ causes performance drop

Passing a blueprint array as an argument to a C++ function causes a spike in Frame rate, game and GPU. This spike is noticeable when using UnitGraph. Attached screenshots show difference in UnitGr ...

Reimport factory not being called for import enabled by plugin

A user reported a problem that started occurring with 4.10 and didn't occur in 4.9.2 (Was unable to get a project in 4.9.2 and thus unable to confirm his claims, therefore I'm not marking this as a ...

Moving Asset back to the location where a fixed up redirector was located can remove it from source control

Thumbnails do not update when setting Primitive Type inside Material Editor

In the Material Editor in UE4 selecting the Primitive Type under Thumbnail in the Details View does not update the preview material. There is no visible change or detail change that can be seen when ...

Multiple simultaneous keyboard event inputs not received

User Submitted Bug Some keys are not registered when pressed with combination of others. ...

Bounds location of apex destructible mesh will not be updated when added to sequencer directly from content browser

Destructible mesh's location will not be updated when added to sequencer directly from content browser, unless two different locations are keyed on the transform track of the mesh. We found the bug ...

Interface cannot be re-implemented after removal from blueprint

If an interface is removed from a blueprint and an interface function is transferred to a local function, the interface cannot be re-implemented in the blueprint. ...

nonstandard bsp additive brushes cause breaking/artifacting on other bsp brushes when colliding

if a nonstandard additive bsp brush collides with a standard additive bsp brush, the surfaces of the bsps break and artifact, causing numerous holes in the brushes. ...

Changing between multiple Streams that are contained within an array does not work

Changing between multiple Streams that are contained within an array does not work. ...

Running PIE with a dedicated server with 2 or more clients will clear undo buffer

The user can no longer undo in the editor after running a dedicated server with 2 or more players ...