Packaged projects do not render in web page using Safari 10.0

UE - Platform - Mobile - Aug 9, 2016

My Macbook Pro uses an Nvidia GeForce 750M and was on Safari 10.0 when this occurred. This did NOT occur on a Macbook Pro with the same card and using Safari 9.1.2. This did NOT occur on an iMac wi ...

Crash occurs when importing attached FBX with default import settings

UE - Editor - Content Pipeline - Import and Export - Dec 22, 2016

While verifying a bug for 4.15 UE-39952 , I tried to repro in 4.14.2 and the editor crashed while attempting to import the attached FBX In 4.15, the Editor does NOT crash a window pops up stating t ...

Decal creates lighting artifacts on edge of meshes

UE - Graphics Features - Aug 22, 2017

When using deferred decals there are artifacts that are caused by the emissive color of the decal when viewing the decals from a low angle. These artifacts appear as thin lines on the edges of the m ...

Checkbox steals input when set to "Self Hit Test Invisible"

UE - Editor - UI Systems - Nov 9, 2017

There is an issue with the checkbox taking input when the visibility is set to "Self Hit Test Invisible". It should not be taking input as it should have the same properties as "Hit Test Invisible", ...

Reimporting an FBX file via the import button does not make the import options appear

Tools - Nov 28, 2017

Reimporting an FBX file via the import button does not make the import options appear. Instead of allowing the FBX to reimport with new options, the FBX just re-imports. This issue is a regression. ...

SetChildActorClass does not replicate when set to a different class

UE - Gameplay - Feb 20, 2019

When using SetChildActorClass to change a Child Actor Class, the change will replicate on the Server but not the Client. The Client will have the original Actor Class after the change happens. This ...

Crash in FVulkanLinuxPlatform

UE - Platform - Linux - Apr 17, 2019

Using the command in the repro steps on Linux will cause the Editor to crash and CrashReporter to pop up with a callstack. This behaves differently when tried on Windows with -vulkan. The project ...

Crash upon opening packaged game when Event Driven Loader is disabled

UE - Foundation - Core - Apr 26, 2019

Packaged games are unable to open when Event Driven Loader is disabled. The error message given is: Assertion failed: !Linker->GetSerializeContext() [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\C ...

"Weld Simulated Bodies" Collision flips when welding Skeletal mesh to Static Mesh

UE - Simulation - Physics - Sep 20, 2019

Collision flipped when welding a skeletal mesh to a static mesh. Welding Skeletal mesh as parent actor does not cause collision to flip. Showflag.Collision 1 shows correct collision. (However px ...

Constraining aspect ratio of cine camera with post process material attached causes rendering issue

UE - Graphics Features - Nov 25, 2019

Applying a PP material that uses absolute world position to a cine camera using "constrain aspect ratio" causes rendering issue. Note: Changing the film back settings on the camera also results in ...