Unreal Engine Issues
Unreal Engine Issues
Attached Project Crashes When Moving Child Actor Components in Blueprints
UE - Gameplay - Blueprint - May 3, 2016The editor crashes when moving a child actor component in the blueprint viewport. This has not been reproduced in a clean project, and only seems to be occurring in the user project where they have ...
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 ...
RootMotionModifier_SkewWarp bug
UE - Anim - Gameplay - Mar 6, 2025In /Game/ABPLinkingShowcase/Blueprints/Pawn_ABPLinkingCharacter: The character mesh’s root location is lower than the capsule’s lowest point. This is what causes the issue. Based on the event graph, ...
UDN : Mutable Trying to Access Invalid UEdGraph Pointer
UE - Anim - Mutable - Mar 6, 2025Hello, We've started seeing a crash within Mutable when it tries to access the source graph in PIE. This only seems to be a problem when running a dedicated server as a separate process. We integra ...
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. ...
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 - Editor - 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 ...