Unreal Engine Issues
Unreal Engine Issues
Event Tick is not running once packaged
UE - Gameplay - Components - Jul 20, 2015Event Tick works when it's running on Windows however once it's packaged or even launched onto all platforms, the event tick does not work as anticipated. This happens on all platforms. *Project ca ...
Navmesh doesn't work in a Packaged Build if it was placed in a Sublevel
UE - AI - Oct 19, 2018Once packaged, a persistent level is unable to create navmesh data properly if the navmesh bounds volumes are only present in its sublevels. The issue can be traced to the UNavigationSystemV1::IsThe ...
Light Function and World Position in 5.4
UE - Graphics Features - Nov 4, 2024When rendering a Light Function into the Translucency Lighting Volume, the World Position Material Expression returns the position relative to the Camera (unrotated), not the World. This can be mor ...
Changes to Instanced Properties default value on BP not propagated to placed actors in the opened level
UE - Foundation - May 15, 2025In UE versions 5.4 and onwards (as of CL 42589677 in Main), when an Instanced UObject property is defined in an Actor Blueprint, modifying the default value in the Blueprint does not propagate the c ...
Yaw input is not always applied as expected depending on whether the yaw input function is called in the Player Controller Blueprint vs in the Character Blueprint
UE - Gameplay - Blueprint - Nov 20, 2018In the attached project, the controller Blueprint is set to apply rotation based on a pair of bool values indicating whether the A (Rotate Left) or D (Rotate Right) keys are pressed. The controller ...
Editor hits Asserts when trying to use debug rendering such as ShowFlag.LODColoration
UE - Rendering Architecture - RHI - Sep 22, 2020The assert in BasePassRendering.cpp:693 fires, crashing to desktop when using this console command in the editor, in PIE, and closes out the window when playing in Standalone. Does not crash when us ...
Packaging to HTML5 fails when Online Framework is enabled
UE - Online - Nov 17, 2018Packaging a project to HTML5 while Online Framework is enabled seems to cause packaging failures. It produces the following errors from the Output Log: PackagingResults: Error: unresolved symbol: ...
Unknown force is applied to the cloth when changing the skeletal mesh LoD with cloth.
UE - Simulation - Physics - Character - Jul 11, 2019There are 3 issuesEach particles don't restore its previous position. Which is for calculating velocity by verlet iteration.The previous transform is cleared by current transform. It provides zero v ...
[AI] WP Dynamic navmesh fails to rebuild tiles with actors that are loaded but not part of the base navmesh.
UE - AI - Navigation - Feb 18, 2025WP dynamic navmesh does not properly react to actors or navigation modifiers that are loaded in areas that the navmesh has not yet streamed into. Although the actors/modifiers are not part of the ba ...
Staging Directory in Project Packaging Settings should not be saved as absolute path
UE - Foundation - Data Pipeline - Cooker - Jun 8, 2021When you package a project via the editor, it updates the ProjectPackagingSettings to set the StagingDirectory to the specific one chosen by the user. However, it saves this path as an absolute path ...