Crash in GetScreenRect on OPPO and Vivo devices

UE - Platform - Mobile - Jul 11, 2017

Cannot export a Datasmith scene to the Unreal Engine project root folder on MacOS.

TM - Interoperability - Oct 29, 2024

This is mac specific. I could do the export normally on Windows with the same Twinmotion CL and UE version (5.5 preview).  It is also a regression specific to 5.5, since I've been able to export a d ...

Disabled Skeletal Mesh Sections cause Shadow Ray Tracing Flicker

UE - Graphics Features - Ray Tracing - Dec 12, 2025

If a skeletal mesh has a section disabled the ray traced shadow will flicker when the camera or itself moves. Previously in 5.6.0 no raytraced shadow would appear if a section was disabled. This wa ...

LineTraceSingleByObject not Returning Valid Physical Material

UE - Gameplay - Mar 22, 2016

Attempting to perform an is valid check on a physical material from a FHitResult returns invalid. This does not occur when using a blueprint setup, it only seems to occur when using code. Found ...

HLSLCC crashed on parsing UAV related instruction

UE - Graphics Features - Oct 10, 2019

1.glsl_type with image was not fully inited with HlslName field set, causing the crash 2.seems many types of op are not support by current hlslcc, cause error msg. e.g. RWTexture2D.Load[Image Remo ...

Vignette in stereoscopic looks incorrect, entire frame as opposed to each eye

UE - Platform - XR - Apr 6, 2016

Vignette seems to be being applied to the entire frame instead of each eye in stereoscopic, creating a really strange effect in your peripherals when viewed through a HMD. Can also see this effect i ...

CrossCompileTool module fails to build due to missing include

UE - Graphics Features - Oct 24, 2016

The include for VulkanConfiguration.h was added to VulkanBackend.h, which is one of the external dependencies for the CrossCompileTool. This include is not complete however. This results in this mod ...

Using Snap Rotation displays the Rotation wrong (or calculates the Rotation wrong and losses precision) when the Y rotation axis is 90 degrees

UE - LD & Modeling - Modeling Tools - BSP - Nov 7, 2019

Although the Details Panel shows the degrees wrong, the object seems to have done it's rotation correctly but not in the right degrees. It will rotate to the position specified but it goes the wrong ...

Using Alt+Click to break Transition node connections cannot be undone using the Undo command

OLD - Anim - Nov 28, 2016

Using Edit->Undo or Ctrl+Z has no affect after breaking using Alt+Click to break the connection of transition nodes. In the My Blueprint tab, extend Graphs->AnimGraph Regression: No - Same behavio ...

Array inputs in Custom Events cause a compiler "note"

UE - Gameplay - Blueprint - Sep 1, 2015

Array inputs in Custom Events cause a compiler "note". On compile, "NOTE" is added to the node, and this appears in the Compiler Results: "Info No value will be returned by reference. Parameter 'Lis ...