Unreal Engine Issues
Unreal Engine Issues
Macbook Pro touchpad two finger click and drag does not rotate the viewport camera
Docs - Mar 14, 2018Using 2 Finger Click + Drag to rotate the Viewport camera does not provide the behavior that is described in the documentation. Instead of rotating the camera in place as the documentation describe ...
Snap To Grid doesn't function in the Static Mesh Editor's Perspective View when moving Sockets
Tools - Jun 29, 2018When moving Sockets around in Orthographic View with Snap to Grid enabled, Sockets snap to the Position Grid Snap value when moved along the Grid. In Perspective View this is not the case and moving ...
Project Crashes on UAIPerceptionComponent::RegisterStimulus()
UE - AI - Apr 26, 2016Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 785] Array index out of bounds: 2 from an array of size 2 Source Context: 363 return OwnerController->GetPawn(); ...
Child Blueprint construction script runs before parent C++ OnConstruction
UE - Gameplay - Jun 25, 2019When the order of construction is backwards it makes it impossible to have native objects set up components in OnConstruction, that a child BP Construction Script then has access to. Sometimes the C ...
Opening Persona causes editor to crash on Linux
UE - Platform - Linux - Nov 17, 2016Attempting to open a skeletal mesh or animation in Persona causes the editor to crash. Regression: Yes Working: 4.13.2 - CL 3172292 Broken: 4.14.0 - CL 3195953 ...
Reading LightAttenuationTexture Produces Unexpected Results With Forward Rendering
UE - Graphics Features - Jul 5, 2018The expected behavior occurs in 4.19; unexpected behavior occurs in 4.20 and 4.21. Marking this as a regression. Per User: Reading the LightAttenuationTexture in a material receives interference ...
StableSpringsSystem has lots of warnings
UE - Simulation - Visual - Apr 6, 2026System successfully compiled with 16 warnings. /Engine/Generated/NiagaraEmitterInstance.ush:2732:250: note: variable 'OutMaterialMultiplier' is declared here void SolveDistanceSpringMaterial_Emitter ...
Auto Reimport crash with some file paths
UE - Editor - Content Pipeline - Import and Export - Dec 14, 2016Auto Reimport source paths can cause a crash with the editor. I couldn't narrow down in my limited testing what would cause the crash vs what would not with these file paths. The one in my attached ...
Run Command fails when launching code project onto Mac from the editor
UE - Platform - Apple - Apr 18, 2017This only affect Launching on code projects. Packaging code projects works fine.LogPlayLevel: Program.Main: ERROR: AutomationTool terminated with exception: AutomationTool.AutomationException: Unabl ...
Remote standalone build of a project fails due to incorrect path to project's Info.plist file
UE - Foundation - Cpp Tools - Automation Tool - Sep 17, 2018Attempting to use UAT on Windows to remotely create a standalone build of a project for Mac fails in 4.19. The error message indicates that it cannot find part of the path to the project's Info.plis ...