Unreal Engine Issues

Specular/Anisotropy problems with Nanite Meshes

Specular highlights can disappear with clearcoat materials, when "Clear Coat Enable Second Normal" is enabled ("r.ClearCoatNormal"). ...

UObject Macro Libraries cannot use functions that require a WorldContext

If you make a Blueprint Macro Library that derives from UObject you are then unable to use any functions that require a WorldContext, like Delay. This is because the WorldContext cannot be assumed l ...

Detect OnHovered event in child widgets even if HitTest(Self/Child) is disabled in RetainerBox

When HitTest(Self/Child) is disabled in RetainerBox, the child widget is assumed to not fire all hit test events. However, in this case, the hit test event is fired in the child widget. This is an i ...

Capturing backtrace of another thread in engine built with clang raises access violation exception

Engine built with Clang throws an exception when calling RtlVirtualUnwind with a different thread ID. Engines built with Microsoft compilers do not occur this problem. For example, if starting PI ...

EnhancedInput Triggers can become stuck in an triggered state after pause when using Set Mode UI Only and CommonUI

TSR fix excessive flickering when subpixel details are in history but not input image

Some debug modes do not work in PIE

It looks like the output of the debug pass is ignored, and the final output from the last frame before the pass was enabled is displayed instead. If the pass is modified to return a different textu ...

Mouse lock on a widget in the RetainerBox is misaligned and locked in the wrong position in the standalone/package application

Locking the mouse to a widget covered by a Retainerbox locks it in a different position in the standalone/packaging application than in PIE.  This does not happen if RetainerBox is disabled and the ...

NiagaraEmitter is saved with the different asset name when renaming with speceficed name

Renaming a NiagaraEmitter to a specific asset name changes it to an unspecified asset name. This happens only with NiagaraEmitter, not with other assets.  ...

Export Asset Task with Directory as Filename causes Editor Crash