Unreal Engine Issues

Mesh reduction crash with asset imported using FBX Scene Importer

The editor will crash when using Mesh Reduction on an asset imported using the FBX Scene Import options. This same asset will not crash the editor if it has been imported using the normal Import opt ...

Inconsistent Spectator Camera Behavior When Run Dedicated Server is Enabled

Spectator cameras don't seem to be set to the correct transform when the ChangeState/ClientGoToState functions are called when using a dedicated server. After testing on a listen server, it appear ...

Virtual joysticks is not properly working when running multiple clients in PIE

When running multiple clients in PIE, It looks like first created viewport client handles every input event. I tried to narrow down the causes and found that it's because SlateApplication knows jus ...

CSM has artifacts if shadow distance less than 2000

OCIO: orthographic viewport perspectives disable color transform

Switching through a non-perspective view disables the OCIO color transformation until perspective is re-selected. (There is also a related Slate-Editor issue where the visible viewport label doesn't ...

Point light leaking throught thin geometry

In 4.27, ray traced point lights can leak through thin meshes. This bug does not exist in Unreal Engine 5, due to many of the potential rendering areas being fundamentally changed. ...

RHIGetAvailableResolutions returns duplicate entries when bIgnoreRefreshRate is false

When the RHIGetAvailableResolutions function fills the array that is passed in as the first argument, it will end up filling some slots with duplicate resolutions (including refresh rate) when the b ...

Preview Instance can still trigger print strings when you PIE

In the given answerhub example, the user has a print string coming from IsNotValid on a check of *TryGetPawnOwner*. This is returning a false negative to him when he PIE's because the Preview insta ...

Editor Dirty flag not updated in Windows task bar until focus is returned

A Blueprint marked Dirty will appear in the Windows Task Bar with an asterisk beside its name. Saving this Blueprint will remove the Dirty flag, but the Task Bar will continue to show the BP as Dirt ...

Deleting a bound function from a widget sets the binding to None which causes compile to fail

Deleting a bound function from a widget sets the binding to None which causes compile to fail. Deleting a bound function from a widget sets the binding to None which causes compile to fail The li ...