Unreal Engine Issues

SkyLight Leaking does not affect reflections when the SkyLight is static but static lighting is disallowed

Reflections do not receive SkyLight leakage contribution from a static SkyLight when static lighting is disallowed. This is caused by the function UpdateSkyIrradianceGpuBuffer checking if the SkyLig ...

Collision on rolling ball template floor incorrectly affects player character

In the rolling ball template, the new floor meshes cause the player character to jump when the player has not pressed any jump commands. It occurs more often if the players movement has been increas ...

[CrashReport] UE4Editor_CoreUObject!FScriptArrayHelper::EmptyAndAddUninitializedValues() [unrealtype.h:2703]

This is a trending crash coming out of the 4.17.0 release. Based on user descriptions, this crash occurs on Play or Compile for affected users. User DescriptionsAgain crashing when I hit playIF I C ...

[MRQ] Deleting all jobs after rendering queue with executor causes an assertion to fail.

Deleting all jobs after rendering queue with executor causes an assertion to fail. Repro Rate: 3/3 Tested this in //UE4/Release-4.27 @ CL#18319896 by utilizing a For Each Loop and Delete Job node ...

Anim curves default back to 0.f instead of material default

This seems to be a regression of [Link Removed]? Difficult to say. Originally reported here: https://udn.unrealengine.com/questions/391665/animcurve-parameter.html ...

Can Ever Affect Navigation does not detect updates to collision settings at runtime

When a mesh has its collision updated during runtime the navigation around the mesh does not update. Workaround: If the mesh is set to simulate physics then updates to its collision will update nav ...

Insufficient precision of Decode71 function

Encode71 and Decode71 in DeferredShadingCommon.ush are functions that convert 8-bit values ​​to 7-bit values ​​and mask values, and licensees have reported that the accuracy is insufficient when usi ...

Standalone window played from editor hits assert Index >= 0 in UObjectArray

Standalone window in editor will hit assert in a bit of time. Issue doesn't happen is playing standalone via Visual Studio. ...

[Interchange] mesh outside LODs hierarchy are added to only lod 0 it should be added to all lods

Log Warning: LogRender:Warning: Missmatch between bShouldGenerateLowQualityLightmaps(0) and r.SupportLowQualityLightmaps(1)

The issue occurs in //UE4/Main as well. This issue can be easily seen by opening any project at latest. It has been observed in new projects both with and without starter content. ...