Unreal Engine Issues
Unreal Engine Issues
The DistanceCurveModifier generates Distance Curves with zero values for Root Motion animations
UE - Anim - Gameplay - Jun 30, 2025The DistanceCurveModifier data modifier generates curves that return zero values only. This issue has been tested on several Animation Sequences with enabled Root Motion and always occurred. ...
LIVE: Multiplying an FQuat*FQuat via pass-by-value crashes editor on open
UE - Foundation - Core - Nov 5, 2014If a function takes in an FQuat value and then multiplies it by an FQuat, the project will build properly but then crash when trying to launch the project in the editor. Example project available b ...
Compile error packaging QAGame with nativization on Mac
UE - Gameplay - Blueprint Runtime - Dec 13, 2016QAGame is failing to compile with Blueprint Nativization turned on ...
TRASH_Comp in Octree that missing unregister
UE - AI - Navigation - Feb 25, 2025the reproduce video and project are in the slack links: Slack Link: [Link Removed] ...
Landscape Grass Type will not build with static lighting leaving 'Lighting needs to be rebuilt warning.'
UE - World Creation - Worldbuilding Tools - Foliage - Sep 3, 2015When using the Landscape Grass Type and using a Static or Stationary light will throw the 'Lighting needs to be rebuilt' warning. ...
Child Actor Component references are not sent to the Server through a Run on Server RPC
UE - Networking - Nov 9, 2015Child Actor Component references are not sent to the Server through a Run on Server RPC. Test project attached. Reproduced in 4.9.2 binary and Main (CL# 2758903). ...
"Play Rate" below 1 and "Force Fixed Frame Interval Playback" causes choppy renders
UE - Anim - Sequencer - Jul 12, 2016"Play Rate" below 1 and "Force Fixed Frame Interval Playback" causes choppy renders. This was explained by Max on Answerhub to the user, but this seemed like something that should be bugged and loo ...
Using a custom #define as the condition for a UFUNCTION's declaration will cause the function to not show in blueprints
Using a custom #define as the coniditon for an #if / #endif that encapsulates a UFUNCTION that is marked as BlueprintCallable will prevent it from being visible in blueprints despite the #if resolvi ...
Collision boxes slow to move when using higher poly meshes
Tools - Jun 15, 2015Collision boxes become sluggish to move when using higher poly meshes. High poly boxes attached (60 K and 120K tris) Users Video for reference: [Link Removed] ...
A duplicated component in the blueprint editor is invisible and the pivot stays at 0,0,0 until compiled
UE - Gameplay - Blueprint - Jun 19, 2015A duplicated component in the blueprint editor is invisible and the pivot stays at 0,0,0 until compiled User Description: Since 4.8 if I duplicate a child actor component in the viewport the dupli ...