Unreal Engine Issues
Unreal Engine Issues
[CrashReport] UE4Editor_UnrealEd!SaveWorld() [filehelpers.cpp:359]
Tools - Aug 31, 2016This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Assertion failed: !bIsReentrant [L ...
Imported animation has one more frame than the original fbx
OLD - Anim - Jul 19, 2016In UE4.12, imported animation has one more frame than the expected frame number. AS_AN_StepAnim_Test.fbx is 60 frame long animation(starts at frame 0, ends at frame 60). When imported to UE4.12, it ...
STAT_AI_BehaviorTree_InstanceMemory is sometimes wildly inaccurate
UE - AI - Jun 10, 2020From the UDN thread: Turns out this is caused by the way this stat was implemented for the FBehaviorTreeInstance struct: 1) You call IncMemoryStats on construct, before the struct is populated with ...
Video material previews incorrectly on Mac
TM - Rendering - Apr 3, 2025Received multiple reports of users on Mac computers experiencing issues previewing video materials in Twinmotion 2025.1. When adding video materials to the scene, the scale seems to be incorrect an ...
Gameplay Tag Query Variables Don't Retain Custom Default Values in Custom Structs
UE - Gameplay - Dec 4, 2019Gameplay Tag Query variables in custom structs created via the content browser do not retain custom default values. Found in 4.23.1 CL# 9631420 Reproduced in 4.24 Preview 4 CL3# 10387632, 4.25 Main ...
Stationary and Movable Skylight with reflection captures in Forward Rendering have inverted capture for geometry
UE - Graphics Features - Oct 25, 2016When using a Stationary or Movable Skylight with some reflection captures that are not using the High Quality Reflections (material setting) will have what appears to be an inverted mask for the ref ...
Changing the name of a GameMode Blueprint that is set as the Default in Project Settings and then clicking the Project Settings Default GameMode dropdown will crash the editor
Tools - Jul 7, 2015Changing the name of a GameMode Blueprint that is set as the Default in Project Settings and then clicking the Project Settings Default GameMode dropdown will crash the editor. No crash report is ge ...
Screen space reflection flickering
UE - Graphics Features - Nov 26, 2019Flickering is occuring when using a reflection material with screen space reflection enabled. Did not start occuring until 4.19 and beyond. Tested in: 4.23.1 CL#9631420, 4.24 P3 CL#10283392, 4 ...
Cascade High DPI bug - No (no proper) horizontal scrollbar in emitter tab
Tools - Mar 22, 2018On a 4K monitor with high DPI support enabled in the Editor some issue will occur with scrolling in particle effect emitters. This causes some of the emitters to get cut off completely and unable to ...
Visual discrepancy appears with local position offset while mipmaps are enabled
UE - Graphics Features - Oct 20, 2017There is a visual discrepancy appears with the local position offset while mipmaps are enabled, when using a custom node that takes information from the local position node, with a texture that cont ...