Unreal Engine Issues
Unreal Engine Issues
Material expression "FloatToUInt" can trigger a check() when input is invalid
UE - Rendering - Architecture - Materials - Mar 11, 2026When a "Float to UInt" Expression is used in a Material Graph with a valid direct input connection that fails to evaluate, function UMaterialExpressionFloatToUInt::Compile() does not catch the input ...
When Mobile Deferred Shading, the DBuffer Decal is affected by metallic value
UE - Platform - Mobile - Jul 22, 2021Use Deferred Shading (r.Mobile.ShadingPath=1) Enable DBuffer Decal All Lights’s mobility is Static Decal Material settings : Material Domain - Deferred DecalBlend Mode - TranslucentDecal Blend Mo ...
Asset produces error "Failed import for object property" upon loading editor
UE - Gameplay - Blueprint - Jan 18, 2016Filepath for asset referenced in Gamemode blueprint produces error: /Game/ACustom/Code/cBP_Gamemode: Failed import for ObjectProperty /Game/ACustom/HUD/Game_UI.Game_UI_C:STMSG Fix up redirectors ...
Splash screens do not appear in Gear VR
UE - Platform - XR - Apr 28, 2017A splash screen that has been set up in the DefaultEngine.ini with the following settings does not show in Gear VR[Oculus.Splash.Settings] bAutoEnabled=True TexturePath=/Game/Texture/AICON-Green ...
Displaying Revision control history for a file ending in an "undo" of a revision can cause a crash
UE - Editor - Jun 18, 2024This crash is caused by how source control history is managed and shown. In this specific case the source control software is Perforce. As written in the repro steps, it can happen to any uasset tha ...
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 ...
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 ...
[CrashReport] UE4Editor_BlueprintGraph!BlueprintActionFilterImpl::IsEventUnimplementable() [blueprintactionfilter.cpp:588]
UE - Gameplay - Blueprint - Jun 1, 2016This crash has been reported through the 4.12 Previews and is continuing to occur in the 4.12.0 release. Additional information about this crash is not available at this time, however it may be the ...