Unreal Engine Issues
Unreal Engine Issues
Ribbon Particle Normals are reversed from default Sprite Particles
UE - Graphics Features - Oct 13, 2015It appears that the Vertex Normals from Ribbon Particles are opposite of what is expected via the Default Particle System given both systems share the same alignment (Facing Camera) [Image Removed] ...
Non-Struct CDO component properties display incorrectly in the property editor.
UE - Gameplay - Blueprint - Aug 17, 2016UObjectProperty properties within a UActorComponent class aren't exposed for editing in the Details panel when choosing to edit native component defaults in the BP editor. ...
Duplicating an inherited Blueprint float variable defaults it's value to 0.
UE - Gameplay - Oct 18, 2018When creating an Actor Blueprint (Testbase), and creating a new Blueprint Actor that inherits from Testbase (TestBP). We can drag an instance of TestBP into the World. If we go back into the Parent ...
Property "GameFeatureData.PrimaryAssetTypesToScan.Directories" should be tagged with "ForceShowPluginContent"
UE - Core - Systems - Oct 11, 2025When using a Game Feature Plugin, one of the settings available in the "GameFeatureData" DataAsset (class UGameFeatureData) is "PrimaryAssetTypesToScan", which is an array of FPrimaryAssetTypeInfo s ...
A build may fail in Visual Studio if a space is added after the # in an include pre-processor instruction to allow a struct in one header file to reference a struct in the other
UE - Foundation - Core - Sep 23, 2016A project building in Visual Studio will sometimes fail with the error Unrecognized type 'FBar' - type must be a UCLASS, USTRUCT or UENUM. This can occur in situations where one struct was reference ...
Hot Reload crash on PIE with custom AIController and Perception Component
UE - AI - Sep 29, 2015If a pawn in the level is using a custom AI Controller that sets the AIPerceptionComponent in code, the editor will crash on PIE after a hot reload. CrashReporter: [Link Removed] ...
StartCameraFade() breaks on mobile projects after editor is closed/reopened
UE - Platform - Mobile - Oct 6, 2015If a project that is set to Mobile/Tablet and Scalable 3D or 2D uses StartCameraFade() to produce a fade in effect, the effect will not play in PIE if the editor is closed/reopened. ...
[CrashReport] UE4Editor_Engine!FMaterial::GetShader() [materialshared.cpp:1790]
UE - Graphics Features - Jun 12, 2018No user comments in crash group 1785 int BreakPoint = 0; 1786 1787 // Assert with detailed information if the shader wasn't found for rendering. 1788 // This is usua ...
Clothing Pops on start and LOD switching
UE - Simulation - Physics - Character - Sep 6, 2018Clothing can have noticeable popping when switching LODs, and there is currently no mechanism to initially start cloth in a resting pose, causing popping on spawn. ...
Crash when merging Skeletal Mesh with incomplete LOD streaming
UE - Runtime - Deformable - Jul 24, 2026SummaryMerging a Skeletal Mesh whose LOD streaming has not completed crashes with an AccessViolation while the vertex copy reads the Null buffers of LODs that have not been streamed inRoot cause is ...