Unreal Engine Issues

Viewport has graphical glitch while editing but not in PIE

User has a project that the viewport has gotten corrupted. The icons are now no longer camera facing and are facing in the positive y axis. The sun disc and sky are blurred. When PIE everything rend ...

A Function whose declaration is in a platform specific "If" block cannot be bound to a delegate

Functions whose definition is in a platform specific "if" block cannot be bound to a delegate and also causes an assert when beginning to play in PIE for the first time since compiling, but the asse ...

Perforce setup with SSL on Linux fails

Unable to connect project to Perforce using SSL on Linux. Linux uses stub libs for SSL rather than linking against full SSL libs. ...

Linux editor windows are completely black

All of the editor windows are completely black on the Linux machine with the exception of the splash screen. This occurs for the Unreal Project Browser, toast windows and game windows. The functio ...

Packaged project crash on open with GEngine & ConstructorHelpers

When GEngine is used in a constructor before calling a ConstructorHelper function, the packaged game will crash on open with an assertion about recursion (see screenshot) ...

Literal Gameplay Tag Container's Return Value does not have ParentTags

Literal Gameplay Tag Container's Return Value does not have ParentTags in 4.17 and 4.18. In 4.16, the value had it. There is same problem in Return node that is Gameplay Tag Container Structure. In ...

UWorld::RemoveFromWorld does not check Pointer Reference for null before use

The code in UWorld::RemoveFromWorld that removes Pawns that are about to be streamed out does not check to see if the pointer that it sets is null prior to using it. In cases where Pawns are rapidly ...

Screen Aligned(Velocity) particles deform at low velocity

Screen aligned particles with very low velocity will squash in 4.23+ (No squashing in 4.22) Confirmed in 4.25 MAIN at CL 10333042 ...

Copying an InstancedStaticMeshComponent does not render correctly

Material cannot be set in MaterialInterface of NiagaraParameterCollection

When MaterialInterface is added to UserParameter of NiagaraSystem, Material can be set in Properties. Also, in UE4main CL15988344, there is no MaterialInterface item in the NiagaraParameterCollecti ...