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 ...

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 ...

Lightmaps not carrying over with 'Save Current As'

I can reproduce it, other developers reported to me too.  Not a problem in 4.22 ...

VFInitRotation(Cascade) always provides the same rotation

This problem caused by incorrect initialization of RandomStream in the GPU particle. //PaticleGpuSimulation.cpp virtual void Init() override { ... check(AllocatedTiles.Num() == TileTimeOfDe ...

Particles can flicker at the end of first emitter loop when interpolated spawning is enabled

Particles flicker at the end of first emitter loop when interpolated spawning is enabled This issue does not occur if interpolated spawning is disabled. This issue does not occur for any of the su ...

SSGI is glitchy with splitscreen multiplayer

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()). ...

The behavior of translucent sorting is different between 4.23 and later.

Also, from 4.23 onwards, if you move the mesh back and forth, the order of the  translucent sort will be switched. ...

Typo: Top Down Sample Template has two folders for lighting. One is spelt "lightting"

Typo of lighting exists in the Top Down Template map.  ...