Unreal Engine Issues
Unreal Engine Issues
ETraceTypeQuery and EObjectTypeQuery not fully exposed to Python
UE - Editor - Workflow Systems - Oct 5, 2021The ETraceTypeQuery and EObjectTypeQuery enums declared in EngineTypes.h aren't fully exposed to Python. Both enums have 32 entries, but Python is only aware of the first 2 for ETraceTypeQuery and t ...
Sampling UV1 on a Nanite mesh with one UV channel returns a constant value
UE - Rendering Architecture - May 17, 2023This is general for any UV channel past what the static mesh has, rather than specifically for UV channel 1. ...
OnlyTickMontagesAndRefreshBonesWhenPlayingMontages visibility option updates anim instance multiple times
UE - Anim - Runtime - Anim Blueprints - Apr 25, 2024The OnlyTickMontagesAndRefreshBonesWhenPlayingMontages setting added in 5.4 is broken. It only works because it unintentionally forces a second call to UAnimInstance::UpdateAnimation (via RefreshBo ...
Skeletal mesh to which the AnimationBudgetAllocator registered in the animation track is applied does not play the initial frame animation
UE - Anim - Runtime - Jun 10, 2025This issue occurs when “Auto Register with Budget Allocator” is enabled for the skeletal mesh. Unchecking “Auto Register with Budget Allocator” seems to resolve the issue. Adding the following to th ...
Mesh Decals render Flat when Combined with a Translucent Material Element on the same Mesh
UE - Graphics Features - Jan 11, 2017A licensee is reporting an issue with mesh decals rendering incorrectly when created as a Material ID (Material Element) and assigning a translucent material to the shared mesh. The use case exampl ...
(global distance field not available in shadow pass) Lighting Artifacts Appear When Using Distance To Nearest Surface With World Position Offset
UE - Graphics Features - Jan 20, 2017When using "distance to nearest surface" node with WPO there are cases where the engine will shade the object incorrect. The attached project reproduces one of these scenarios. It appears as though ...
Particle Parameter Won't Update If Used With EventReceiver Spawn
UE - Niagara - Jan 26, 2017Particle Float Parameter for the EventReceiver Spawn doesn't update when accessed via blueprint it just retains whatever default value is assigned in cascade. I've confirmed other modules work as ex ...
"Multiple Values" in Body Setup when single bone has multiple bodies
Tools - Feb 3, 2017"Multiple Values" in Body Setup when single bone has multiple bodies Regression: YES Worked: 3172292 (4.13.2) Broken: 3249277 (4.14.3) ...
Graphical issues in editor after changing monitor resolution on Linux
UE - Platform - Linux - Feb 23, 2017Changing the monitor resolution on Linux causes Editor windows to show graphic errors. ...
Component default data can be lost for a non-nativized Blueprint class that inherits the component from a nativized parent Blueprint class.
UE - Gameplay - Blueprint - Sep 5, 2018This is a regression that was introduced by the fix for [Link Removed]. The fix makes an invalid assumption that instances of components whose archetypes are inherited by a non-nativized child Blue ...