Unreal Engine Issues

Parameterized Vector4 is treated as Float3

A Parameterized Vector4 are being treated as Float3. This prevents users from being able to use Vector4s in an If node during runtime. This is seen as far back as //UE4/Release4.22 cl 8065155 so th ...

Templated enum GetValueAsString function returns incorrectly formatted string

For many years there has been a static function on UEnum called GetValueAsString which would convert an enum like EAttachmentRule::KeepWorld to the string "KeepWorld", if you passed in the explicit ...

Current animation asset is lost in animation preview when a post process anim BP is compiled

UDebugSkelMeshComponent and PreviewInstance are lost current animation asset. There are 2 ways to fix below void UDebugSkelMeshComponent::InitAnim(bool bForceReinit) { // If we already have Pre ...

Ragdoll stops mid-air when activated during root animation

Calling a native interface function implemented by a non-nativized Blueprint asset from a nativized Blueprint asset will silently fail at runtime.

In the sample project we have a Widget Blueprint asset (SomeWidget) that implements a native interface (PrintSomethingInterface.h). However, in the DefaultEditor.ini file, we've also excluded all Wi ...

Returning the base class type by literal value in a base class function will return a different value in a child class when it's nativized.

If a base class function returns its own class as a literal value, the nativization process will emit the literal term as "GetClass()" rather than as the actual value (e.g. UBPBase::StaticClass()). ...

Get polygon data via GetPolysInBox that are outside the box

GetPolysInBox should get only the polygons(FNavPoly) that are on the bounds of the box. However, there are cases where polygon data outside the bounds of the box is currently obtained. It gets polyg ...

Instanced EditInlineNew Objects not correctly propagating to children and placed level instances

Instanced EditInlineNew objects are kind of broken right now and hard to make full use of. In addition to the notes above, there are some cases where you can't even assign new values into the base c ...

Unable to input with IME in widget component.

Unable to input IME text in widget component, but able to input IME text in textbox like UMG designer.  It works fine until 4.21, however it wasn't able to work after 4.22. Workaround: void FSla ...

BP - Nativizing a UMG widget hierarchy in which a child widget of another widget BP type has the "Is Variable" box unchecked will result in a crash at runtime.

When the "Is Variable" box is unchecked for a BP-typed child widget, a variable will not be created at Blueprint compile time to reference the child widget in the nativized widget BP class. This bre ...