Unreal Engine Issues
Unreal Engine Issues
Static lighting crash on 5.4 when using landscape with WPO
UE - Graphics Tools - Terrain - Landscape - May 22, 2024When static lighting is built for a landscape with "Use Material Position Offset in Static Lighting" enabled it causes an editor crash. Licensee mentioned it was likely caused by a commit for 5.4, C ...
Mover MoveDirectionIntent can be 0 due to interpolation
UE - Gameplay - Player Movement - Apr 22, 2025If two states have MoveDirectionIntent vectors that are opposite to each other, interpolating between these states can result in MoveDirectionIntent being 0. This may cause issues for animation blue ...
Skeleton does not match Full Body IK node debug.
UE - Anim - Rigging - Control Rig - May 13, 2025In a simple setup of the Fullbody IK control rig node, when you turn on the debug draw of the ik solve. The lines and the skeleton do not align. ...
Out-of-Bounds Access During Partial Updates of ISMC Per-Instance Custom Data
UE - Graphics Features - Jan 6, 2026When using instance custom data values, removing an instance and changing the number of custom data floats in sequence can cause an array-out-of-bounds crash. The underlying arrays are not resized ...
Crash in blueprints when opening right-click menu
UE - Gameplay - Blueprint - Apr 22, 2015Right clicking inside the event graph of a blueprint that is derived from PhysicsCollisionHandler will crash the editor CrashReporter: [Link Removed] ...
Pausing PIE does not stop timelines from running if players is set to more than 1
UE - Networking - Nov 23, 2015Pausing PIE does not stop timelines from running if players is set to more than 1. Test project attached. Reproduced in 4.9.2 binary, 4.10.0 binary, and Main (CL# 2776829) ...
Compile error when declaring UPROPERTY() TArray with TFixedAllocator
UE - Foundation - Core - Feb 20, 2015Declaring a UPROPERTY() TArray with TFixedAllocator fails to compile. Output log states "Missing '>' in 'tarray'." Removing/commenting out the UPROPERTY() allows the project to compile correctly. ...
Light Source Angle Input disabled when switching to static light on directional lights
UE - Graphics Features - Jan 14, 2015If the directional light is switched from stationary to static, the Light Source Angle Input option is disabled in the details pane. ...
CPU Collision is being offset on Z
UE - Graphics Features - Sep 29, 2014DESCRIPTION: Collision's on CPU Particles are incorrectly being offset on Z by several units [Link Removed]https://answers.unrealengine.com/questions/105202/mesh-particle-collision-bug.html EDIT: ...
Target pin creates compile errors unless value is set outside of node
UE - Gameplay - Blueprint - Jan 8, 2015Some nodes have target pins that auto-fill to target: self. However, unless a value is passed into this node from a get or other means, the blueprint will not compile. ...