Unreal Engine Issues
Unreal Engine Issues
Setting Lightmap Coordinate Index Past 3 Causes Mesh to Get No Lightmap Information
UE - Graphics Features - Nov 20, 2018Meshes with their Lightmap Coordinate Index set to anything over 4 will not be lit by static or stationary lighting. Found in CL# 4.19 4033788, 4.20 CL# 4369336, 4.21 CL# 4541578, 4.22 CL# 4573698 ...
Unable to change Blueprint Child Variable values in Python
UE - Editor - Workflow Systems - Dec 20, 2018Using the Python function unreal.SystemLibrary.set_bool_property_by_name() to change the default variable values of a child Blueprint do not work as intended. Tested in 4.20.3 (CL - 4369336), 4.21. ...
The GetCombinedForces put out wrong value when the vehicle is reversing
UE - Simulation - Core - Aug 19, 2022Reproduced 3/3 times. A similar bug occurred with PhysX ( [Link Removed] Closed ) Check the function: FVector FSimpleAerod ...
Dark square appears in hair in direction of spotlight when shadows disabled
UE - Graphics Features - Sep 18, 2024A dark square appears in the direction of a spotlight on hair when the spotlight has no shadow. [Image Removed] In UE 5.4 the dark square is visible when the spotlight has no shadow, and a light s ...
DistanceToNearestSurface node does not work when r.DistanceFieldAO is disabled
UE - Rendering - Architecture - Materials - Jul 16, 2025The problem seems to be that the bUsesGlobalDistanceField flag in the ShouldPrepareGlobalDistanceField() function checks for usage on the material, but it doesn't seem to take effect. The material u ...
Crash when creating a local variable inside of a collapsed node graph that has been copied
UE - Gameplay - Blueprint - Nov 5, 2015If the user creates a function with local variables and then collapses the variables down into a collapsed graph and then duplicates this collapsed graph the variables in the second graph will be gr ...
Blueprint Break on Exceptions does not work with Accessed None errors
UE - Gameplay - Blueprint - Jan 14, 2015The experimental feature Blueprint Break on Exceptions does not work with Accessed None errors. To test, create an actor variable in a blueprint and use it as an input to a function without having s ...
[MAC][OCULUS]: Oculus Audio SDK Support
UE - Platform - XR - Jun 29, 2015When/if Oculus ever restore Mac support add the audio SDK too. Investigate if there's anything we can do in the interim and if not then do a much better job that VR only works on Windows & add dialo ...
Crash when selecting "show" > "uncompressed animation" in Persona
OLD - Anim - Jul 1, 2016From this UDN: https://udn.unrealengine.com/questions/301289/crash-in-persona-debug-display.html Proposed solution: In UDebugSkelMeshComponent::GenSpaceBases() before PerformAnimationEvaluation() ...
Crash Occurs on Second PIE When Using Seamless Travel to Travel From One Map to Another That Contain the Same Sublevel
UE - Gameplay - Dec 6, 2016The editor is crashing on the second PIE attempt when using seamless travel to travel from one map to another when both maps contain the same sublevel. The travel is taking place using: PlayerContr ...