Unreal Engine Issues
Unreal Engine Issues
Translucent materials in the PostMotionBlur pass can cause a flickering viewport artefact when using TAA
UE - Graphics Features - Feb 5, 2025There appears to be a bug relating to rendering multiple windows that can trigger under unknown circumstances. It has been reported on rectangle lights in the forums and on PostMotionBlur materials ...
Crash rendering image sequence if the Sub-Level with matinee is not loaded
Tools - Apr 15, 2016Crash rendering image sequence if the Sub-Level containing the matinee is not loaded. This seems to go away if the level is either set to "Always Loaded". Seems to be a result of people not switch ...
Editor crashes with 2 or more Clients when spawning in a Blueprint created from a Static Mesh using the Blueprint/Add Script button
UE - Networking - May 14, 2015Editor crashes with 2 or more Clients when spawning a Blueprint created from a Static Mesh using the Blueprint/Add Script button. Blueprints created from Static Meshes using other methods do not cau ...
When breaking a level instance, foliage instances in the LevelInstance are placed in the wrong location
UE - World Creation - Worldbuilding Tools - Level Instances - Jul 8, 2023Following code works as a work around. The code updates placement information of instances. TMap<UFoliageType*, TArray<const FFoliageInstancePlacementInfo*>> AInstancedFoliageActor::GetInstancesF ...
AddLocalTransform node does not match scale behavior described in the node's documentation
UE - Gameplay - Blueprint - Jun 29, 2018The comment for the AddLocalTransform node states "Change in transform of the component in its local reference frame. Scale is unchanged." However, when the node is used, the existing scale of the o ...
Ensure breaking a link in anim blueprint Event Graph and then undoing
UE - Gameplay - Blueprint Editor - Jul 18, 2016Ensure occurs when the user breaks a link in the animation blueprint's Event Graph and then undo's the action. I wasn't able to reproduce it in a class blueprint. ...
[CrashReport] Crash on Mac during cook - UEditorEngine::UpdateAutoLoadProject()
UE - Platform - Apple - Jun 6, 2017This is a top crash on Mac. This crash has only occurred on the 4.16.1 release (there are no records of it in 4.16.0). Repro steps are currently unknown, but the crash occurs in Commandlet mode and ...
Control Rig settings are not retained between editor sessions or carried into deployed game
UE - Anim - Rigging - Control Rig - Jun 10, 2020Control Rig settings are not retained between editor sessions or carried into deployed game ...
[CrashReport] Mac crash - TArray<FDeferredMacEvent, FDefaultAllocator>::ResizeGrow
UE - Platform - Apple - Sep 14, 2017This is a somewhat common crash on Mac that has affected users since 4.16. Users have not provided any descriptions of their actions when the crash occurred. Callstack from Log [2017.09.08-05.17. ...
Compiling a blueprint with SetCollisionResponseToChannel Causes Crash
UE - Gameplay - Dec 5, 2016When using a blueprint with a destructible component, you can call the SetCollisionResponseToChannel node of that component in the construction script. As a result the engine will crash when attempt ...