Unreal Engine Issues
Unreal Engine Issues
Poses Asset UI doesn't update correctly when updating from new source animation
OLD - Anim - Jul 11, 2016If the user updates to a new Source Animation for a pose asset, while a pose was active in the viewport (weight set to 1.0), the pose will be set to 0.0 in the pose list even though it's still activ ...
Merge Actors (Simplify) is broken with Substrate Shader Models Node
UE - Rendering - Features - Shading Models - Sep 29, 2025Substrate Materials cannot be baked when Meshes are merged using the "Simplify" method. All textures except for the normal are reduced to a single black parameter. The normal texture produced does n ...
Physics Constraint Actor Won't Disable Collision Between Two Actors That Are Already Colliding
UE - Simulation - Physics - Feb 17, 2020Meshes that are colliding that are set as constraint actors don't follow the Physics Constraint Actors "Disable Collision" parameter if they are colliding prior to being set as constrained actors. ...
[CrashReport] UE4Editor_Core!rml::internal::ExtMemoryPool::initTLS()
UE - Graphics Features - Feb 17, 2018No user comments in crash group 108 #endif 109 void* NewPtr = NULL; 110 #if PLATFORM_MAC 111 // macOS expects all allocations to be aligned to 16 bytes, but TBBs ...
Unnecessary reference remains in material instance when using StaticSwitch in material
UE - Graphics Features - Aug 7, 20191.Create a material that switches textures using StaticSwitch. 2.Create a material instance and toggle the switch to overwrite the texture. 3.Then return the static switch settings to their defaul ...
ImageSize in Image widget is not set when setting a texture as a brush
UE - AI Workflows - UI Systems - UMG - Aug 1, 2023Since FDeprecateSlateVector2D has been implemented in 5.2, the following function calls will always fail. Therefore, the ImageSize is not updated. This problem does not occur in 5.1. void SBrus ...
IsSpatiallyLoaded = false set in actor blueprint is not respected in standalone game
UE - World Creation - Worldbuilding Tools - World Partition - Jul 1, 2024In past compatibility detection in FWorldPartitionClassDescRegistry::PrefetchClassDescs, as AssetRegistry.TryGetAssetPackageData returns UE::AssetRegistry::EExists::Unknown in standalone games, so t ...
Directional light triggers 'too many overlapping lights' error in forward shading
UE - Graphics Features - Sep 24, 2019The underlying reason seems to be that the stationary lights require SM channels for casting shadows from movable objects and they are assigned channels 0,1,2 by lightmass (or somewhere along the w ...
Rect lights cause visual noise on the light rendered when using raytracing
UE - Graphics Features - Lumen - Nov 12, 2019Rect lights cause visual noise on the light rendered when using raytracing. It is easier to see when you get rid of all other light sources in the scene. I have attached an example project. This se ...
Naming an Event Dispatcher the Same as an Overridable Function Corrupts the Event Dispatcher
UE - Gameplay - Blueprint - Oct 21, 2015Creating an event dispatcher in a widget blueprint with the name OnDrop, which is already an existing overridable function, causes the event dispatcher to become corrupted and prevents it from being ...