Unreal Engine Issues
Unreal Engine Issues
Fbx importer can import valid under 30Hz anim at 30Hz
Tools - Jul 17, 2017The samplerate of a track was compute with the following formula Equation 1: number of Key / animation Time This formula work only if we have animation keys that are time equidistant. example of ...
Surface Profile Skin shading has some unexpected stripe rendering issues
UE - Graphics Features - Apr 3, 2018So it looks like the artifact is definitely related to whether sss checkboard is enabled, but I can't reproduce it if enabling checkboard right after open the map, I mean it has to be reproduced aft ...
Cannot touch at top of screen after input japanese on UEditableTextBox on IOS
UE - Platform - Mobile - Apr 5, 2022[translated comment from licensee] This issue can be found in a IOS project using the Integrated Keyboard. it occurs when using a Japanese keyboard on EditableTextBox. There is no problem with Engl ...
Incorrect Lumen Scene direct lighting when objects behind masked landscape
UE - Rendering - Graphics Features - Lumen - Oct 5, 2025When objects are placed behind or beneath a masked landscape and r.Lumen.HardwareRayTracing.SurfaceCacheAlphaMasking is enabled, the direct light evaluation is incorrect. There are two workarounds, ...
Non-determinism in StaticMeshComponent::BodyInstance when cooking LevelInstances
UE - Runtime - Simulation - May 21, 2026A licensee reported that serialization of LevelSequence with StaticMeshActor with default collision for which mesh has NoCollision profile is not deterministic. The issue seems to be in the fact tha ...
[CrashReport] UE4Editor_Engine!UBodySetup::FinishCreatingPhysicsMeshes() [bodysetup.cpp:464]
UE - Simulation - Physics - Oct 27, 2017This is a trending crash coming out of the 4.18 release. User DescriptionsWas moving assets that were migrated from another project. Source Context 451 if(bClearMeshes) 452 { ...
ExpandEnumAsExecs always uses first Exec if an argument name matches Enum value
UE - Gameplay - Blueprint - Jan 13, 2023Reproduced 3/3 times, issue also occurs in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed NOT a Regression. EnumBugBP uses two enum cases and three argument cases for 6 total permutations:Enum w ...
The selection operation with notify track in Persona is not compatible with custom window display scaling
UE - Runtime - Animation - Jun 4, 2025It appears that notify track does not follow the size of the custom window scale. As a result, display problems may occur, and events may be placed in unexpected positions. This is similar to ...
Material Shared Samplers do not honor Texture Quality console variables
UE - Graphics Features - Apr 28, 2016When using shared samplers in the material do not adjust quality when adjusting the console variable or texture quality in Engine Scalability for SG.TextureQuality. Attached is an image for demons ...
Modulated Self Shadowing can not be disabled for Static Meshes
UE - Platform - Mobile - Feb 6, 2017Modulated Self Shadow is only ever disabled and enabled for Skeletal Meshes and does not have any effect on Static Meshes. You can use the command r.Shadow.EnableModulatedSelfShadow 1 to enable self ...