Unreal Engine Issues

Set functions in UWindDirectionalSourceComponent are not exposed to be called from code

None of the Set functions in the UWindDirectionalSourceComponent are able to be called from code. The functions can be called from Blueprint, but without the ENGINE_API macro, none of the functions ...

Pasted material function nodes lose their connections

The fix for [Link Removed] caused a regression where links to material nodes no longer carry over when a group of nodes is copied and pasted ~ User submitted Image and repro steps appended. I conf ...

The CopySkinnedModelData() function is no longer called from anywhere in the Engine

The CopySkinnedModelData() function is no longer referenced by any code in the Engine as of 4.19. The function should either be marked as deprecated or removed from the Engine. ...

Call In Editor functions not working in blueprints

Context When selecting a component on an actor, any CallInEditor functions on the component's class appear as buttons in the details panel. Problem The CallInEditor functions don't execute in Blu ...

Lighting Build fails with World Settings Error

Lighting Builds seemingly successfully but produces a Map Check Error for World Settings. There are several things that can be done to "eliminate the issue" and I have separated them into different ...

Private functions can be overriden in the "My Blueprint" tab

Discovered during investigation of [Link Removed]. This is happening because we are not filtering out private parent functions in SMyBlueprint::BuildOverridableFunctionsMenu. With any fix that is ...

Delegate fixup doesn't work when bound functions are not in the current BP

When BP functions are bound to native delegates with float parameters, we perform fixup on the BP functions such that their float parameters are converted from double precision to single precision. ...

Calling a parents function that is used in a child blueprint from a spawn actor from class node that is being called back in the parent will cause an error

If the user calls a function (We will call it "Parent's Function") from a child blueprint and then turns around and tries to call that implementation of the Parent's Function with in the parent it's ...

Stationary Sky Light has double lighting contributions to StaticMeshActor on MobilePlatform

Incorrect number of parameters in empty Shipping version of the DrawDebugString() function signature

The DrawDebugString() function has to versions. One is the actual function to display a string of debug text in non-Shipping builds, and the other is an empty function that is used in Shipping build ...